"PpP" is a work in public space about the French philosopher Pierre Bayle (1647–1706). Twice a day, loudspeakers fill the square with the almost 16-minute composition "PpP". The loudspeakers, 32 in all, are distributed across a surface of 30 x 30 meters and lie hidden under the metal grating on the ground. The sound grows like an invisible cathedral from the ground. In the composition, which has a beginning and an end, we hear prayers, singing, sermons, and percussion instruments from all world religions. They overlay each other as if they were performing worship in the same room simultaneously, but not together.