House of One

The House of One is an ecumenical religious structure being built in Petriplatz, on Leipziger Strasse, Fischerinsel, Berlin, Germany. When completed, the building will be a house of prayer for three religions, containing a church, a mosque, and a synagogue. Colloquially, the building is called a churmosqagogue.

The structure was designed by Kuehn Malvezzi in the Modernist style, and is being built on the site where St Peter's Church, (Petrikirche) a 13th-century Protestant church, the first in Berlin, was located from approximately 800 years. The church and associated square were heavily damaged during World War II and the former church was subsequently demolished in 1964 by the East German communist regime.

The foundation stone was laid in May 2021. The project is expected to cost €47 million, of which the German Federal Government has provided €20 million, €10 million from the Berlin state government, €9 million via major donations, and the remainder through a broad community fundraising appeal.