The Great Clarity – The STEIN in May 2025

Building design
Brückner & Brückner Architekten have transformed the listed Diözseanmuseum Freising into a transparent, light-filled meeting place. In addition to the German Natural Stone Award, the museum was also awarded the Bavarian Architecture Prize and the State Prize for Architecture 2024. "Collecting, preserving, documenting, presenting and meeting are the tasks of a museum," said the jury, explaining its decision. The Diocesan Museum has solved these in a contemporary way in a historical location: "Unique, inviting and sensual, it radiates a special radiance in Freising today". And yet it feels as if it has always been like this. Cover picture: : André Mühling, Munich

In STEIN 5/25, we showcase large areas subject to heavy use, such as the Quai Zurich Campus in Switzerland. Three courtyards and the facade were designed here using Bollinger sandstone—a tribute to natural stone, not only for its beauty and durability but also for its sustainability. A particular eye-catcher: a twelve-meter-long fountain. Natural stone was also used extensively in the renovation of the Diocesan Museum in Freising. Both historic and new Dietfurt limestone lend the building a special character and sense of quality, both on the facade and inside. For this, the museum was awarded the 2024 Natural Stone Prize. Near Berlin, we take a look at Altlandsberg, where the castle grounds are increasingly transforming into a sought-after cultural and event venue.

According to the German Natural Stone Association (DNV), natural stone in public spaces is currently trending. This sustainable building material is not only weather-resistant but also resistant to wear and tear in high-traffic areas. In addition, natural stone requires only minimal maintenance, making it a cost-effective option for the long-term design of public spaces and heavily used areas.

Low Maintenance

Another key factor in the renovation of the Quai Zurich Campus was that the use of natural stone contributes to reducing CO2 emissions and improving the ecological footprint. The Zurich Insurance Group headquarters is one of the most sustainable buildings in the world, combining historic 19th-century structures with modern architecture. Find out how Austrian architect Adolf Krischanitz approached the project starting on page 6.

Sustainable Project

Natural stone was also used in the renovation of the historic Diocesan Museum in Freising, which was transformed into a transparent, light-filled gathering place. A combination of historic and new Dietfurt limestone gives the building a distinctive character, both on the facade and inside. For this, the museum was awarded the 2024 Natural Stone Prize. Read more on page 14.

Award for a Special Aesthetic Impact

Large areas of natural stone in outdoor spaces are ideal for barrier-free urban planning. Historic paving, in particular, can be found in numerous market squares, pedestrian zones, and traffic-calmed streets. Find out on page 34 which machines stonemasonry companies use when the ravages of time turn natural stone into a tripping hazard, when there are slip hazards, or when barriers that are difficult to overcome have developed.

For Accessibility

And there’s another topic that’s currently a top priority for nearly a third of companies that we’d like to bring to your attention: succession planning. How do you even find potential successors, and what do you need to keep in mind? Read more about this starting on page 44.

The STEIN editorial team wishes you
STEIN Editorial Team Redaktion@stein-magazin.de

The magazine is availablehere!

In our latest issue, 04/25, we’re featuring exciting bathrooms. Read more about it here.

Succession planned?

YOU MAY ALSO LIKE

Walter Wachenfeld deceased

Building design

On March 1, 2015, Külter stonemason Walter Wachenfeld passed away at the age of 89. The senior partner of Wachenfeld Naturstein GmbH in Volkmarsen-Külte worked in the family business until he was very old. After the Second World War, he completed his training as a stonemason and took over the family business, which has existed since 1883. From 1965 to 1985, he was on the journeyman’s examination board and […]

On March 1, 2015, Külter stonemason Walter Wachenfeld passed away at the age of 89. The senior partner of Wachenfeld Naturstein GmbH in Volkmarsen-Külte worked in the family business until he was very old.

After the Second World War, he completed his training as a stonemason and took over the family business, which has existed since 1883. From 1965 to 1985, he was on the journeyman’s examination committee and from 1980 to 1995 on the advertising committee of the German Natural Stone Association. His company was also successfully involved in the preservation of historical monuments: in 2006, he was awarded the Hessian Monument Prize.

Walter Wachenfeld promoted innovation and creativity. Even after 60 years of working in his own company, he emphasized at the 125th anniversary celebration: “We should allow crazy things to happen in our companies and pursue the implementation of good ideas with passion”. Open to new ideas, he was always eager to break new ground himself – as in the further development of the self-supporting spiral staircase. Today, his son Michael runs the family business, which was included in the list of the Top 100 in the “Top 100: Award for the most innovative medium-sized companies” competition in 2002. In the spirit of the deceased, “quality in the tradition of craftsmanship with technical innovations and timeless design concepts” remains the company’s top priority.

Social responsibility was another important component of Wachenfeld’s life. He was involved in a wide range of voluntary work, for which he was awarded a letter of honor by the state of Hesse, and sat on the Volkmarsen-Külte local council as a member of the FDP from 1953 to 1972. In the 1970s, he became a town councillor and magistrate, before finally being appointed town elder in 1977. The local politician with close ties to his home town was also a supporter of TV 08 Külte and a member of the advisory board of Volksbank Kassel.

Vienna celebrates Maria Theresa

Building design

Workshop

What the Reformation is to the Germans this year, the 300th birthday of the ruler Maria Theresa is to Austria. Various exhibitions in Vienna are currently celebrating the Habsburgs’ most powerful woman. RESTAURO visited the Austrian Belvedere Gallery in Vienna during the preparations for its anniversary show and met the restorers Stefanie Jahn and Bettina Urban as well as curator Dr. […]

What the Reformation is to the Germans this year, the 300th birthday of the ruler Maria Theresa is to Austria. Various exhibitions in Vienna are currently celebrating the Habsburgs’ most powerful woman. RESTAURO visited the Austrian Belvedere Gallery in Vienna during the preparations for its anniversary show and met the conservators Stefanie Jahn and Bettina Urban as well as curator Dr. Georg Lechner.

“Maria Theresa’s (1717-1780) commissioning and acquisition policy still shapes some of the Belvedere’s collections today,” explains curator Georg Lechner, who conceived the major anniversary exhibition “Maria Theresa and Art”. “During her reign, the collection grew, particularly in the field of landscape painting. Maria Theresa’s commitment to the gallery was great. Despite the existence of directors and curators, the monarch’s personal approval for art acquisitions can also be found in the archival records. The works that were created during her lifetime and can be traced in the collection at the latest through the catalog published by Christian von Mechel in 1783 show that Maria Theresa not only bought historical works, but also increasingly turned to contemporary art. However, it must be said that the acquisition of works by old masters was an expensive pleasure even then.” Maria Theresa was particularly supportive of artists living in what is now Austria. For example, the monarch commissioned the four-part Heron Stain in Laxenburg and the Battle of Hochkirch from Johann Christian Brand to decorate her palaces. “Women rarely appeared as patrons or collectors at the time,” says Belvedere curator Georg Lechner.

A highlight of the Viennese show is the large painting of the monarch from the workshop of Martin van Meyten the Younger (1695-1770). The important late Baroque painter – a native Swede of Dutch descent – was one of the preferred portraitists of the Austrian imperial family under Maria Theresa and developed his specific style, influenced by various European models, during various study visits to France, England and Italy. The full-length portrait now on display in the exhibition repeats the painter’s famous work in the Vienna Academy of Fine Arts. This was used to decorate the council chamber of the Academy and was once also full-length. It was only after 1790 that it was cropped as a knee-length piece. Thanks to the Belvedere version, it is now possible to see Meytens’ main work, which is still impressive despite the reduction in size, in its original state.

“During the restoration of this painting, we were able to discover exciting details,” explains Stefanie Jahn, Head of the Conservation Department. “For example, we discovered that the canvas had been extended. In the past, the painting was probably intended to be presented in its current frame. For this reason, a piece of canvas was attached, sewn on and glued. The upper and lower parts of the picture were then painted. We also wanted to find out whether a stencil had been used to transfer the original to our painting and examined the painting using infrared reflectography. This was not the case, but preliminary drawings and older underpaintings were found under the painting. We also discovered the inscription ‘Her Highness Empress Maria Theresa’. The lettering was probably painted over when the painting was enlarged, as the inscription would now have been placed in the middle of the painting due to the fragmentation of the canvas. After the examination, we cleaned the rather dirty painting. Now the fine painting of the precisely rendered facial features and the detailed depiction of the elaborately crafted garments have been beautifully restored.”

You can find out more about the restoration work in the current issue of RESTAURO, which will be published tomorrow, July 11, 2017.

The following video shows impressions of our visit to the Belvedere: Restoration manager Stefanie Jahn explains her work on the large Maria Theresa painting from the workshop of Martin van Meyten the Younger (1695-1770) to editor Dr. Ute Strimmer.