The House of One is a public multi-religious house of prayer and learning to be built in the center of Berlin. Kuehn Malvezzi designed a synagogue, a church, and a mosque under one and the same roof. The overall form of the House of One presents itself to the city as a single entity. The spatial experience of the interior, however, contrasts with this perception. Inside, the three Abrahamic faiths assert their autonomy and differences following their specific liturgies. The three sacred spaces for Jews, Christians and Muslims are each independently sculpted into the substance of the building and grouped around a central space which simultaneously acts as an in-between space as well as a place of encounter. In a series of models Kuehn Malvezzi together with artists Armin Linke and Marko Lulić further explore the different concepts and contents of the House of One.