Ostrów Tumski (meaning "Cathedral Island"; German Dom Insel) is an island between two branches of the river Warta in the city of Pozna in western Poland. Pozna Cathedral and other ecclesiastical buildings occupy the central part of the island. Ostrów Tumski is part of the city's former Nowe Miasto ("New Town") district, although it is actually the oldest part of the city, where the rulers of the early Polish state in the 10th century had one of their palaces. In the current administrative division of Pozna , Ostrów Tumski is part of an osiedle which also includes the neighbourhoods of ródka, Zawady and Komandoria, all on the east side of the river.