God’s Ski Jump

Building design
Embedded in the adjacent greenery: a sustainable ecological surface protection concept protects the natural stone façade from graffiti and contamination and prevents chemicals from entering the natural area. Photo: Rufus 64 / Wikicommons
Embedded in the adjacent greenery: a sustainable ecological surface protection concept protects the natural stone façade from graffiti and contamination and prevents chemicals from entering the natural area. Photo: Rufus 64 / Wikicommons

Expressive natural stone cladding with precision-fit protection

Churches aren’t built very often these days, but that’s not the only unusual thing about this expressionist-style new building in Munich’s affluent suburbs. In addition to ceramic tiles, local Nagelfluh stone was also used. The solid natural stone had to be prepared to meet various requirements for both interior and exterior use.

Rupert Mayer was a Jesuit priest who, among other things, opposed National Socialism as part of the Catholic resistance in Munich and was beatified in 1987. The “Apostle of Munich,” as he is also known, is the patron saint of the gleaming white, light-filled new church, which was built between 2015 and 2018 in the municipality of Poing, an eastern suburb of the Bavarian capital. The distinctive design of the Blessed Father Rupert Mayer Church impressed not only the Association of German Architects—which honored the building with one of Germany’s most prestigious architectural awards, the Große Nike—but also the local community. While the Baumeister envisioned a crystalline form when designing the “solitär”—a freestanding building that stands out stylistically from the surrounding structures—the congregation is reminded of winter sports. They affectionately call their new church “God’s Ski Jump.”

15,000 ceramic tiles cover the 30-by-30-meter-high polygonal roof structure, causing it to shimmer when the light hits it just right. The 3-D ceramic tiles were handcrafted and glazed by m&r Manufaktur in Ransbach-Baumbach based on a design by the architectural firm, using slip casting—a molding process from traditional porcelain production. In contrast to the delicate shapes of the tiles, the massive base section of the facade, as well as the wall base and floor area inside the church, are made entirely of polished Brannenburger Nagelfluh from the Upper Bavarian gravel plain by Grad Nagelfluhwerk GmbH & Co. KG.

Nagelfluh is a conglomerate rock containing rounded rock fragments of various origins. Rock fragments from the Central Alps were transported by mountain streams into the Alpine foothills, where they were deposited and subsequently filled and consolidated by the overlying pressure of younger sediments and lime precipitated from the groundwater. Due to the high proportion of binding material, the natural stone appears homogeneous overall despite the presence of various rock inclusions. It formed during the Pleistocene, making Nagelfluh a relatively young rock. Its appearance is characterized by open and clearly visible pores. The Brannenburg Nagelfluh originates from a Nagelfluh massif in the region of the same name, which formed during the Würm Glacial Period. The rock has been quarried there since the 10th century. In southern Germany, Nagelfluh can be seen in many buildings; examples include the facade and the large portal of Ludwig Maximilian University in Munich, as well as the foundations of Munich’s Frauenkirche and the Old Technical City Hall. Its use in new construction is less common, as seen at the Seliger-Pater-Rupert-Mayer Church in Poing.

The nine-centimeter-thick facing masonry made of solid Nagelfluh needed special protection against graffiti, as well as other environmental influences. Due to the natural stone’s typical structure, the substrate has varying levels of absorbency. When removing dirt and paint, residues could remain on an unprotected facade.
The choice fell on the preventive surface and graffiti protection system PSS 20 from PSS Interservice GmbH. The protection system met the specifications of the client, the Catholic Church Foundation of St. Michael: The coating, which is barely visible to the naked eye, is fully reversible, and its polysaccharide- and carbohydrate-based formulation—that is, sugar and potato starch—met the requirements for environmental friendliness. “It is a purely plant-based product without any chemical carriers,” assures Bernd Pfennig, the PSS Interservice technical consultant responsible for the protective coating measures on the sacred site, “which is why it is also frequently used by historic preservation authorities.” PSS 20 forms an ultra-thin film on the surface of the Nagelfluh and protects against graffiti as well as general contaminants such as splashing water, de-icing salts, and dog urine. “Natural stone has a capillary system; contaminants easily penetrate the stone through its open pores and alter the surface’s appearance. The porosity of natural stone is therefore the actual cause of soiling, and specific surface protection systems provide a solution here,” explains the expert. The natural stone facade nevertheless remains completely open to water vapor diffusion; the small amount of moisture that does penetrate can be immediately released again via the vapor phase.

Read more in STEIN 8/2019.

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The Lohengrin desk originally stood in the Lohengrin House in Graupa, which is now part of the Richard Wagner Memorial. It was here that Wagner spent his vacation with his wife Minna from 1846 and drafted the composition sketches for the opera “Lohengrin”. In 1928, the desk was purchased by the former Wagner Memorial and moved to Bayreuth to the Wahnfried House, Wagner’s former home. It was run as the Richard Wagner Museum from 1976 until it was closed in 2010 for extensive renovation work. In August 2015, the work will be completed and Haus Wahnfried, adapted to modern standards, will be opened to visitors together with a new museum building and the burial place of Richard and Cosima Wagner on the site – as a new museum complex with the National Archive of the Richard Wagner Foundation.

Object sponsorships made it possible to restore a number of collection objects that had been in Haus Wahnfried for decades. The objects are assigned to different restorers, who carry out the conservation and restoration work and document it in detail. The restoration of “Wagner’s death sofa”, for example, has already been completed and the before and after states can be seen in pictures on the website. There will not be such a stark contrast with the Lohengrin desk, which is being worked on in Andreas Scheuch’s restoration workshop: “Above all, we are carrying out conservation work, leaving traces of use and ageing.”

Previous condition of the desk

The Biedermeier furniture is listed in the inventory as a mahogany desk. The supporting wood of the two-part piece of furniture (desk with top) is made of softwood, the drawers are made of maple with the exception of the fronts. The insides of the doors are veneered with stained and polished maple. The mahogany veneer has the veining typical of the Biedermeier period (“pyramid mahogany”). The small profile strips and half-round strips are largely made of solid mahogany. The writing desk has drawers that can be locked on both the left and right sides – ten in total – whose locks, keys and key bushes are of a high standard of craftsmanship and could therefore be locked securely. “An indication that the desk was made as a piece of storage furniture for important documents,” says Scheuch. The keys and some of the sockets are missing. The surfaces of the light-protected insides still give an indication of the original coloration and the degree of gloss of the hand-polished surfaces. The green writing surface on the original pull-out writing board shows heavy traces of use, ink, ink and presumably sealing wax.

Restoration steps

After documenting the previous condition and determining the restoration objectives, the furniture is cleaned dry and damp. Loosened solid wood parts and veneers are consolidated with glutinous hot glue, conspicuous flaws that distort the overall appearance are replaced with wood of the same type following the outbreak. The high-quality locks are cleaned and repaired by the metal restorer, and missing key bushes and fittings are reproduced. Fitting the missing and broken key bushes requires delicate craftsmanship. The existing surface is cleaned and any imperfections are carefully matched with a neutral retouch. Finally, the gloss level on the heavily thinned areas is adjusted with diluted shellac and the polishing pad. The aim here is to achieve a cohesive overall appearance while retaining the signs of wear and time. Originally, there were small balusters or moldings on the top of the top and on the sides of the writing tablet, which are now missing. Traces of the mounting are still present and have been left as such.

Path of the object

The inventory entry for the Lohengrin desk describes its journey to Bayreuth as follows: “Lohengrin desk Bi 1249, previous owner: Mrs. Ritter Gift from Heinrich Balles Kw. [purchase value] 16.6.1928”. “Würzburg” is noted on the back of the piece of furniture, but it is not clear where it definitely came from. What is certain is where the desk will go after its careful restoration: it will be returned to Bayreuth together with its historical traces and thus to the collection of the Richard Wagner Museum and National Archive and will be available for special exhibitions.