English summary: The Ostraca House in Abu Mena is a medium-sized multi-story building, which was badly destroyed by fire after the Arab conquest of Egypt (at around 639/42). Despite being used by neighboring inhabitants as landfill, it led archeologists to the discovery of nearly 2000 Greek ostraca. In this volume Peter Grossmann examines the origins of these ostraca. The house was an official building owned privately and not by the state, which had,...