Castle-Tower Regensberg / L3P Architects

© Vito Stallone

Architects: L3P Architects
Location: Regensberg, Canton Zurich,
Project Architects: Boris Egli Arch.FH, Rolf Lüthi Arch.SIA
Light planning: Vogt + Partner, Winterthur
Exhibition: René Kindlimann, Aathal
Historian: Dr. Bruno Meier, Baden & Dr.Dominik Sauerländer, Aarau
Cantonal historic monument preservation: Beat Stahel
Client: Foundation Castle Regensberg
Gross floor area: 47.4 sqm, 6 floors
Project Year: 2009
Photographs: Vito Stallone

The castle-tower is under historical monuments’ protection and is a distinctive landmark in the region of Zurich. The tower is 21 metres high, the walls being up to 3 metres thick, and the interior radius averaging about 3.5 m.

As old as the hills and rusty fresh: rusty steel is used for all fixtures; the archaic expression of the castle-tower is underlined.


All existing technical installations have been removed, integrated in the walls or disguised in the timber work hung with rusty wire meshing. This pacification of room lends a marked accent on the stonework of the walls and the mounted objects exhibited on them. The medieval atmosphere has been reinforced with indirect and diffuse lighting.

© Vito Stallone

The exhibition wages through local history vertically. As one ascends the levels, the exhibition themes become younger in their historical development: from mediaeval times on the ground floor, to the 20th century on the 5th floor.

As the battlement is ascended, one is ultimately confronted with the modern era. The weather-proofed exit is in reference to the interior free space of the upper castle. The materialisation with fibre glass, as well as the volumetry reminds one of a snail shell discovered petrified in the battlement cover. Information signs on the flat roof illuminate the modern era view.

© Vito Stallone

The outdoor lighting of the tower has been renewed with a contemporary projection technique, which completely reduces light pollution and brings a 12-fold reduction of energy use.

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Cite: "Castle-Tower Regensberg / L3P Architects" 21 Mar 2010. ArchDaily. Accessed 24 May 2015. <>