A short detour from what I usually post.
The Brother Klaus Field Chapel, designed by a Swiss hermit architect better known as Peter Zumthor. Zumthor designed the small chapel in Mechernich, Germany for the patron saint of the farmers, Brother Klaus. To build the chapel he enlisted the help of all of the famers to build a wooden wigwam out of tree trunks. When the wigwam was finished, they poured concrete in 24 layers, let it dry, and then burned out the trees, leaving a charred interior. During the concrete pouring they bored holes throughout the walls so that small dots of light cover the space. It’s pretty incredible.
Images via Archdaily, the sketch is Zumthor’s own.