The architecturally interesting island, Wyspa Piasek (Sand Island) is populated by no less than three churches: the imposing Church of Our Lady on the Sand (ul. Św. Jadwigi 1), once built on the remains of a (sandy) circus ground, the Gothic St. Anna’s Church (now a preschool, ul. Św. Jadwigi 11), and the Eastern Orthodox Church of St. Cyril and St. Methodius (ul. Św. Jadwigi 15). Other buildings of note include the Wrocław University Library on the Sand (ul. Św. Jadwigi 3/4), once an Augustine Monastery, and Maria Mill, which straddles Wyspa Piasek and Wyspa Młyńska. In 2005 a memorial to Cardinal Bolesław Kominek was unveiled next to the church, commemorating the clergyman’s 1965 Letter of Reconciliation of the Polish Bishops to the German Bishops, one of the first attempts at Polish-German reconciliation after WWII.