The Temppeliaukio Church by Timo and Tuomo Suomalainen (1969) is carved out of the rock in central Helsinki. There are lots of thoughtful details to make the whole idea work, including a sort of verge at the edge of the floor, where the wall descends beneath the concrete slab (see second from last photograph, with location specific adaptations to grate).
The Chapel of Silence in Helsinki by K2S Architects. The interior views are taken in daytime. The interior walls are solid alder, maybe 80 to 100mm thick.
I’m in Helsinki at the moment – so any material on the blog will be from here for the next few days
The interior of a Russian submarine that was in Hamburg a few years ago
A moody shot of Instrument One
Two wild flight of paint from Instrument Five
Some more views of the model and a general view of the drawings and model for the Camden Town House project (see also HERE) from my exhibition at the iCP gallery in Hamburg in 2005.