The sixth volume of the Selinus series deals with the monumental altars in the urban sanctuaries of Selinunte. Nine large altars from the sixth and fifth centuries B.C., which are investigated with the methods of building archaeology, allow the reconstruction of the architectural development in Archaic and Classical times. In a comparative study altars in other Western Greek sanctuaries are taken into account. On this basis questions of sacrifice and ritual practice are addressed, so that a comprehensive picture of the altars of the Greek West is created.