A final farewell blow

Building design

After three years of training, trainees in the stonemasonry trade in Wunsiedel can look forward to the traditional graduation ceremony. Since the Middle Ages, the training period of a craftsman has ended with a ceremonial graduation. Compared to those days, however, today’s trainees are not showered with beer. Two journeymen from Regensburg Cathedral carry the historic flag of the Regensburg Stonemasons’ Guild […]

After three years of training, trainees in the stonemasonry trade in Wunsiedel can look forward to the traditional graduation ceremony. Since the Middle Ages, the training period of a craftsman has ended with a ceremonial graduation. Compared to those days, however, today’s trainees are not showered with beer.

Two journeymen from the Regensburg Cathedral Building Lodge carry the historic flag of the Regensburg Stonemasons’ Guild and lead the procession of apprentices into the workshop. The master apprentices follow with the guild chest. Inside are the stonemasons’ tools. The head of the European Training Center and master of ceremonies Erwin Hornauer awaits them in the training hall. “Have the apprentices been trained to your satisfaction?” he asks the master Jürgen Richter. He nods in the affirmative. Each apprentice receives a blow with the yardstick from the head master of the local stonemasons’ guild, the symbolic last chastisement from the master and thus a farewell to the apprenticeship.

Scenes like this at the traditional graduation ceremony at the European Training Centre for Stonemasons and Stone Sculptors seem much more civilized than those that are said to have taken place in medieval times: In those days, it was not uncommon for the journeymen to be beaten, slapped and sometimes showered with beer. After three years of apprenticeship and examination, trainees are still given a proper send-off today and Wunsiedel still holds on to a traditional ceremony, albeit less rough. This was the case at the end of July this year, when 32 stonemason apprentices completed their training.

The newly qualified journeymen have to strike their first blows with hammer and chisel on a block of stone: Two light, quick blows, symbolizing eagerness to work, and one powerful blow, symbolizing deliberation. The ceremony ends with the presentation of certificates and a banquet, accompanied by lots of music – from regional musicians and their hunting horns, of course.

“Only someone who is constantly learning can be successful in their profession in the long term,” emphasizes Erwin Hornauer, head of the training center. “The Wunsiedel Stone Center offers a demand-oriented range of training courses for our trade and we welcome every course participant.”

The European Training Center has recently been expanded into a competence center for stonemasonry and stone carving. The inauguration of the new building is scheduled for 2017. The training program will be expanded to include a focus on design and modern CNC technology.

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Holography as a design medium: the end of the screen?

Building design
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Modern architectural design of a white concrete building under a blue sky, photographed by Foad Roshan

Holography as a design medium – the end of the screen? Anyone who still believes that the future of architecture will be played out in 2D on monitors and tablets has either read too little science fiction or simply missed out on the innovation spurts of recent years. Holography is preparing to dethrone the screen as the central design tool. Why this is more than just a technical gimmick and what revolution is actually rolling towards us – we explain here with a sharp pen, a cool head and plenty of insider knowledge.

  • Holography offers a radical new dimension to the architectural design process – beyond the mouse and display.
  • Germany, Austria and Switzerland are at the forefront of technology, but are hesitant to use it across the board.
  • Digital planning, AI and holography are increasingly merging to create new working methods.
  • Sustainability benefits from more immersive, less error-prone design processes – at least in theory.
  • Technical expertise is changing rapidly – from CAD operator to spatial designer.
  • The architectural profession is facing fundamental changes in training and practice.
  • Debates about costs, accessibility, data security and the sense or nonsense of holography are dividing the industry.
  • Global trends are putting pressure on the DACH region – Asia, North America and parts of Scandinavia are setting the pace.

Holography: from trade fair toy to design medium with explosive power

Holography has had an amazing career in architecture – from a dusty gimmick at technology trade fairs to a serious design medium. The screen, for decades the gateway to the digital world, is now facing stiff competition. Where renderings and 3D models used to be presented in flat format, today the building floats in the middle of the room as a holographic image. What sounds like a marketing gimmick has established itself as a real tool in research institutes, large planning offices and increasingly also in local authority building departments. The advantages are obvious: immersion, spatial perception and interactivity achieve a quality that a monitor simply cannot offer. Suddenly the design becomes accessible, construction errors can literally be walked around, and even laypeople can intuitively grasp complex relationships. It is no longer a secret that holography has disruptive potential in this area. But the industry is skeptical. The investment costs are high, the training requirements should not be underestimated and many companies lack the necessary infrastructure. However, the first to take the plunge are reporting considerable efficiency gains – not to mention the wow effect for customers. Those still clinging to the screen today may be museum-ready tomorrow.

In Germany, Austria and Switzerland in particular, technology is viewed with typical Central European reserve. The innovative spirit of tech start-ups meets the reservations of the planning bureaucracy. While entire districts have long been developed holographically in Singapore, here in Germany it is usually only enough for pilot projects and innovation labs. But the pressure is growing. The requirements for flexibility, precision and comprehensibility of designs are increasing rapidly – not least because developers and investors have long been accustomed to different standards internationally. If you don’t keep up, you lose.

The technology itself is also no longer what it was five years ago. Advances in projection, tracking and cloud-based data processing make holography suitable for everyday use. Integration with BIM and GIS systems is within reach, and AI-supported algorithms are helping to generate meaningful, visualizable models from mountains of data. What remains is the question of mindset: are architects and engineers ready to rethink their craft? The screen has long been the lowest common denominator – holography calls for more courage, more openness and, yes, more experimentation.

The vision: collaborative design processes in which teams in different cities, even on different continents, work on the same hologram. Misunderstandings and communication breakdowns, which are unavoidable in traditional meetings, could be a thing of the past. Holography sets new standards for participation, transparency and efficiency. However, as is so often the case in the construction industry, there is an ocean of regulations, fear of losing control and quite banal budget constraints between vision and everyday life.

Anyone wondering why the breakthrough is just around the corner will find the answer in the technological leaps of recent years. Hardware is cheaper, software is more powerful and user skepticism is fading – at least slowly. The screen has had its day, say some. The screen is here to stay, counter the others. As is so often the case, the truth lies somewhere in between. One thing is certain: Those who don’t move will be overrun by the hologram wave.

Digitalization, AI and holography – the new triumvirate of design planning

If digitalization and artificial intelligence have already shaken up architecture, then holography is the next logical step. It is not an isolated gadget, but the link between data and perception. Its great strength lies in the fusion of digital precision and spatial experience. While classic visualizations still end at the edge of the screen, the hologram opens up a new space for ideas and decisions. AI ensures that relevant, comprehensible models are created from billions of data records, while holography makes these models tangible for everyone involved. This not only changes the workflow, but also the roles in the design process. The planner becomes a curator who no longer just designs, but orchestrates – between algorithms, material reality and human intuition.

In practice, it looks like this: A BIM model is evaluated by AI, errors and optimization potential are automatically marked, and the result appears as a holographic image in the meeting room. Changes can be made in real time and immediately checked spatially. This not only saves time and money, but also minimizes the risk of planning errors, which traditionally only become apparent on the construction site – with all the familiar consequences. Holography is not an end in itself, but a response to the increasing complexity of construction tasks. It makes the invisible visible and the complex understandable.

Collaboration also benefits enormously. Multidisciplinary teams, which previously often planned at cross purposes, find a common denominator in the hologram. The model becomes a communication platform – intuitive, interactive and unambiguous. The digital transformation of the construction industry is thus reaching a new level. It is forcing everyone involved to leave their comfort zones and embrace new processes. Those who fail to do so will soon only be working for the rearguard of the industry – the future will be elsewhere.

However, as always, so much euphoria should be treated with caution. The flip side of the coin: if you lose control of the data, you also lose control of the design. Dependence on software providers, cloud services and proprietary formats is growing. Data protection, data sovereignty and cybersecurity are becoming key challenges. Open, collaborative planning in the hologram is not a sure-fire success – it must be actively designed and protected. Otherwise, the beautiful appearance could quickly become a trap.

The debate about the sense and nonsense of holography divides the industry. Some see it as a tool for vanity and showmanship, while others see it as the key to urgently needed modernization. Both sides are right – at least a little. The decisive factor is how the technology is used: as a show effect for render porn or as a serious working tool. The answer lies in practice. Those who create real added value will prevail. Those who merely dazzle will fall by the wayside.

Sustainability and holography – hope or hot air?

A popular myth: holography makes planning more sustainable because errors are detected earlier and resources are used more efficiently. Sounds convincing, but is only half the truth. Yes, immersive access to designs helps to uncover planning weaknesses before they mutate into expensive building damage. Simulations of daylight, energy flows or material cycles can be presented clearly and comprehensibly in the hologram. This leads to better decisions and ideally reduces the ecological footprint of a project. But the reality is more complex. The technology itself is resource-intensive – from hardware production to the power consumption of the server farms that calculate the data for the holograms.

In Germany, Austria and Switzerland, the issue of sustainability is viewed particularly critically. Subsidies are only granted if the ecological added value can be proven. This forces providers and users to take a closer look: How much energy does a hologram consume compared to a classic monitor? How can holography systems be integrated into sustainable planning processes? Anyone who cannot answer these questions will have a difficult time in German-speaking countries. At the same time, however, new opportunities are opening up: Participatory planning, transparent decision-making processes and the early involvement of stakeholders can help to find more sustainable solutions – provided that holography is used wisely.

So the big sustainability question remains: how can we manage the balancing act between technological progress and environmental compatibility? The answer is anything but trivial. New standards, clear guidelines and, above all, an awareness of the side effects of digitalization are needed. The industry must learn to think not only in terms of effects, but also in terms of life cycles. Holography is not a panacea, but it can become a building block for more sustainable planning – if it is part of a holistic concept.

Another aspect is that the democratization of planning through holography could lead to greater acceptance of sustainable projects. Those who understand what is being built and why are more willing to make compromises. Holography makes complex relationships visible and understandable – an opportunity that traditional presentations rarely offer. But here too, without transparency and open communication, the technology remains a toy for experts.

Ultimately, practice is the deciding factor. Anyone using holography to plan more sustainably must be prepared to question old ways of thinking and break new ground. This is uncomfortable, but necessary. The future of sustainable architecture will not be decided on the screen – but in the hologram, which asks more questions than it answers. Those who rise to this challenge can win. Those who focus on the quick effect will quickly end up on the digital sidelines again.

Technical know-how and new professions: Who understands the hologram?

Holography not only turns technology and processes on their head, but also the demands placed on professionals. The classic CAD draughtsman has had its day. What is needed today are specialists who can think and work in three-dimensional, dynamic environments. Spatial designers, data engineers and VR architects are no longer exotic, but key players in the design process. However, training is lagging behind. Universities and universities of applied sciences are experimenting with holographic laboratories, but integration into regular operations remains slow. Most architects and engineers are still learning for the screen, not for the hologram.

Technical know-how is shifting rapidly. Anyone who wants to design successfully today needs knowledge of data management, interface programming and interactive visualization. The ability not only to create BIM models but also to optimize them for holographic presentations is becoming a competitive advantage. At the same time, the importance of soft skills is growing: communication, the ability to work in a team and the willingness to constantly learn new things are more in demand than ever. Holography is not a sure-fire success – it requires a new mindset and a willingness to throw old routines overboard.

The question of accessibility remains central. Not everyone can afford a high-end holography system, and not every office has the human resources to keep up with the technology. The risk of a digital divide is growing. Those who are at the forefront set the standards – those who lag behind become service providers for the big players. This is neither new nor surprising, but it is particularly explosive in times of skills shortages. The industry is faced with a choice: continue to muddle along as before – or invest in training, infrastructure and innovation.

The interfaces with other disciplines are also changing. Urban planners, building physicists and landscape architects must learn to deal with holographic models. The traditional distribution of roles is becoming blurred. Anyone who still believes they can get by as a generalist today will quickly become an extra in the hologram. The future belongs to those who specialize – and at the same time remain open to interdisciplinary collaboration.

The big challenge: how can knowledge be transferred across the board? There are enough pilot projects and lighthouse buildings. What is missing is the nationwide anchoring of holography in training and everyday working life. This is where politics, chambers and associations are needed – and of course the companies themselves. Anyone who remains fixated on the screen will miss out on the next stage of evolution. Those who understand the hologram are shaping the future of architecture.

Global trends, regional realities and the future of design

A look beyond the horizon shows: Holography has long been part of the global architectural discourse. In Asia and North America, immersive design processes are standard in many major projects. Scandinavian countries are investing specifically in research and training in order not to lose touch. Germany, Austria and Switzerland, on the other hand, are still hesitant – the fear of bad investments is too great and the legal framework too unclear. But international competition never sleeps. If you don’t invest today, you will lose out tomorrow – and with it orders, talent and innovative strength.

The debates in the industry are diverse. Some warn against the commercialization of design processes, which loses sight of the added value for users. Others see the danger of algorithms and holograms restricting the creativity of architects. Still others fear a loss of control over data and processes. But the truth is: holography is here to stay. It will not replace the design process, but it will fundamentally change it. Those who ignore this will soon be playing second fiddle.

The role of AI and digitalization should not be underestimated. They are the prerequisite for holography to be used sensibly at all. Only those who structure data properly, link models intelligently and design processes flexibly will be able to exploit the technology’s full potential. The challenges are enormous: interoperability, data security and standardization are unresolved issues. But the pressure is increasing – from clients, investors and not least from the users themselves.

The impact on the architectural profession is massive. Traditional skills are no longer enough. If you want to work seriously with holography, you have to keep learning, master new tools and be prepared to take responsibility for complex, networked processes. This is uncomfortable, but unavoidable. The architecture of the future is digital, collaborative and immersive – and the hologram is becoming the new gold standard.

The question of the sense and nonsense of holography will occupy the industry for a long time to come. But one thing is clear: the freedom to ignore the new technology will soon no longer exist. Those who experiment, learn and invest now have the chance to set the standards of tomorrow. Those who wait will be overrun by the next wave of innovation. Welcome to the world after the screen.

Conclusion: the hologram is coming – and the screen is going

Holography is more than just a fancy gimmick. It is the design medium of the future – and it poses huge challenges for the industry. Those who continue to stare at the screen are missing the opportunity to revolutionize the design process. The technology is there, practice is slowly catching up. What is needed now is courage, openness and the willingness to cut off old habits. The screen was yesterday. The hologram is the new reality of design. Anyone who misses out on this will soon be nostalgic for the days when renderings were the measure of all things. The future is spatial, immersive and – finally – tangible.

Germany’s tallest buildings – Top 10

Building design

Since its completion in 1999, the MAIN TOWER has been a central eye-catcher on Frankfurt's Zeil shopping mile. Photo: Helaba

We present the ten tallest buildings in Germany, tell you which new buildings have been added in the past year and explain their special features.

We present the ten tallest buildings in Germany, tell you which new buildings have been added in the past year and explain their special features.

Things are happening in the highest spheres: In the last few months, Germany’s top ten tallest buildings have seen two new additions. The Omniturm by Danish architecture firm BIG and the Grand Tower by Magnus Kaminiarz & Cie have entered high society. And something else is new: whereas German skyscrapers were previously used exclusively as offices, apartments are now also moving into Germany’s tallest towers. The almost 190-metre-high Omniturm is designed as a mixed-use tower and aims to combine different types of use.

In addition to offices and apartments, the building also houses restaurants and service providers. The Grand Tower, on the other hand, is by far Germany’s tallest residential high-rise. It is a remarkable development that real estate developers in this country now also see the possibility of financing a 180-metre-high skyscraper with luxury apartments. However, the location of the two new buildings is hardly surprising. Like the other eight tallest buildings in Germany, they are located in Frankfurt am Main.

The Opera Tower and Taunus Tower, which currently share tenth place, are expected to have to say goodbye to the top ten next year. Then the “One” with its 190 meters will be completed and move up to sixth place in the ranking. And with the tallest of the four high-rises in the “Four Frankfurt” project, designed by UNStudio, Germany’s future number three with a height of 228 meters is already in the making. Everything that is being built outside the Main metropolis is significantly lower.

The tallest building outside Frankfurt is the Post Tower in Bonn, currently number 13 in the country at 162.5 meters. The Alexanderhochhaus, an apartment tower designed by Ortner & Ortner, which was started in 2019, will be the tallest building in Berlin at 150 meters when it is completed in 2023, but will probably not even be in the national top 20 by then.

A reminder of better times for the crisis-ridden finance house: when Normen Foster completed the high-rise building with its triangular floor plan and floor-spanning conservatories in 1997, it was considered a pioneering example of green technology and progressive workplace design. In contrast, the building’s lack of progress meant that it was almost completely isolated from its surroundings in Frankfurt’s city center, making it appear as a foreign body in the urban space to this day. Like the whole of Frankfurt, the Tower has become a beneficiary of Brexit: Since the British left the EU, the building is once again the tallest within the territory of the community of states.

Probably the most visible legacy of postmodernism in Frankfurt: Helmut Jahn’s skyscraper brought a piece of the USA to the Main in 1990. The silhouette of the Messeturm is reminiscent of the classic New York skyscrapers of the 1920s and 1930s. On closer inspection, one recognizes Jahn’s play with basic geometric shapes: A cylinder grows out of a cube and is crowned by a pyramid. The red granite with which the building is clad picks up on the color of the red sandstone from which large parts of Frankfurt’s old town were built.

The American architecture firm Kohn Pedersen Fox, which has been building skyscrapers like an assembly line since the 1980s, is responsible for the design of the Westendstrasse 1 high-rise in Frankfurt. The most striking feature of the semi-cylindrical building, which was completed in 1993, is its projection at the top. Ostensibly a reference to Frankfurt’s former position as the coronation site of the German emperors, the tower is more reminiscent of the aureole of the Statue of Liberty, making it look a little like the ambassador of New York’s business spirit in the city skyline.

The MAIN TOWER is very popular with Frankfurters and tourists alike. It houses a publicly accessible viewing platform, as well as a viewing restaurant and a sky bar. Since its completion in 1999, the skyscraper designed by architects Schweger + Partner has been a central eye-catcher on Frankfurt’s Zeil shopping street, in the direct extension of which it is located.


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Since its completion in 1999, the MAIN TOWER has been a central eye-catcher on Frankfurt’s Zeil shopping mile. Photo: Helaba

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The skyscraper is popular with Frankfurters and tourists alike thanks to its viewing platform, viewing restaurant and Skybar. Photo: Helaba

The MAIN TOWER shares fourth place with Tower 185, which was completed in 2011. In his design, architect Christoph Mäckler took up a central design element of his Opera Tower, which is two years older: He divided the volume of the high-rise vertically with a striking setback, thereby taking away much of its massiveness. However, he arranged the two “wings” of his building at a slight angle to each other. Unlike the Opera Tower, Tower 185 does not have a natural stone façade. Instead, the building is clad with a bronze-coloured aluminum façade, which is broken up by black details.

The concept of the Omni Tower is that of the high-rise building as a vertical city, as described by Rem Koolhaas in his classic “Delirious New York”. The Omni Tower not only houses offices, but also floors with apartments inserted in between. Where the apartments are located, the architects from the Danish firm BIG shift the floors towards each other so that they protrude from the cube of the tower. Balconies belonging to the apartments are located on these “protrusions”. The base of the tower houses restaurants, a fitness studio and a co-working space, among other things, which provide services for the residents of the building. BIG sees this as an opportunity to compensate for small living spaces. At the same time, the aim is to liven up Frankfurt’s banking district in the evenings and at weekends. It remains to be seen whether this will work; the first tenants have recently moved in.

Despite its height, the Trianon is one of the gray mice among Frankfurt’s office towers. Today, Deka-Bank has its headquarters in the building, which was completed in 1993 and designed by a consortium of architects comprising Novotny Mähner Assoziierte, HPP and Albert Speer & Partner. The building, which consists of a triangular core with three equally triangular towers at the top and is crowned by an inverted triangular pyramid, has since been sold several times from one real estate fund to the next.

Quite a few people were disappointed when the building by Coop Himmelb(l)au, whose design had won the top-class international competition, was given its glass façade. While the two towers leaning against each other and the atrium in between were still recognizable as three independent components, they now looked like one huge, twisted volume despite the different glass colors. Thanks to its stand-alone position to the east of Frankfurt’s old town, the tower, which was completed in 2014 after some difficulties, at least has enough space around it to make an impact. It remains to be seen whether the historic fabric of Martin Elsaesser’s Grossmarkhalle really needed to be so heavily interfered with in order to use it as the foyer of the high-rise.

Germany’s tallest residential high-rise, which is about to be occupied and will house over 400 luxury apartments, is just a stone’s throw away from Frankfurt’s Bahnhofsviertel. This may have seen worse times, but it is still unmistakably a center of European standing in terms of drug consumption and trafficking. So perhaps the concierge in the foyer of the Grand Tower is not a bad decision. If residents are not drawn to the station district, they can alternatively run their errands in the Skyline Plaza, the ECE mall with the usual mix of retail chains, which is located right next to the building. It remains to be seen whether this will be enough to persuade the targeted buyers from Asia, Russia or the USA to buy property for over 30,000 euros per square meter in some cases.

Undoubtedly one of the most beautiful high-rise buildings in Frankfurt in recent decades: Christoph Mäckler’s design not only impresses with its elegant division into two sections, its base structure also ensures that Frankfurt’s Opernplatz has a clear urban structure again. This makes up for the loss of the Zurich Tower, one of the city’s first high-rise buildings, which previously stood on this site. In return for the demolition and the right to build higher, the investor undertook to extend the adjacent Rothschild Park on his land. The light-colored natural stone used to clad the tower and base building creates a link to Opernplatz and the Alte Oper.

The Taunus Towers are actually Taunus Towers. This is because the project, which was completed in 2014, consists of a 170-metre office tower and a 68-metre residential tower block. More precisely, the Taunusturm office tower is not a monofunctional building, as it is also an art museum. The Frankfurt Museum of Modern Art MMK occupies a 1,500 square meter exhibition hall on the first floor of the building as a branch of its main building in Frankfurt’s old town. The architectural firm Gruber + Kleine-Kraneburg provided the design for both the residential and office tower. They divided the office tower into two interconnected cuboids, one of which ends with an eye-catching pitched roof.

Do you know the tallest building in the world? Our colleagues from G+L present it to you here: Tallest buildings in the world.