The oldest buildings on Ostrów Tumski are the Late Romanesque Church of St. Idzi from the early 13th century and St. Martin's Church, a remnant of the princely castle of the Silesian Piasts from the turn of the 12th and 13th centuries.

The Sakwowy Bastion is a historic defensive structure that was part of the former fortifications of Wroclaw. Today it is a popular place for walking and relaxation. It looks beautiful at night, when it is illuminated. From the top you can enjoy the view of the City Moat. There is also a café and restaurant in the complex.