The main hall of Sancaklar Mosque in Istanbul, Turkey. A simple, cave-like space 7 meters below ground with exposed stone and concrete walls. Designed by Emre Arolat Architects (EAA) and built in Architecture Festival, Religion Winner)
An inset glass box is used here to capture the reflected light of an outdoor Zen garden and to bring it indoors along the floor. The wall becomes a glowing prism of light during the day, and a glowing alcove as seen from the outside at night.