The Church on Hohenzollernplatz in Berlin, commonly known as 'Powerhouse of God', is considered a masterpiece of German brick Expressionism. It is based on a design by Ossip Klarwein (1893-1970) who, despite the importance of his building, is hardly recognised as an architect to this day. Even in Israel, where Klarwein's construction of the Knesset in Jerusalem and numerous other projects significantly shaped the architectural image of the newly founded state, his legacy has yet to be comprehensively analysed.

This monograph fills this gap and presents the first comprehensive study of his work, that still resonate today. It is intended as an overview of Klarwein's entire oeuvre, making available for the first time extensive sources from his scattered estate and thus providing an impetus for further research.