"The three towers on the Schlossberg hill (591m) overlook the Alsace plain and date from 11th to 13th centuries. The middle tower, the Wahlenbourg, is the oldest. The Dagsbourg o the north and the Weckmund to the south were built in the 13th century.
https://www.tourisme-alsace.com/en/253000542-The-Three-Castles-of-Eguisheim.html