Schleswig Cathedral, also known as St. Peter's Cathedral, is a historic church located in Schleswig, Germany. It was originally built in the Romanesque style in the 12th century and later underwent significant Gothic renovations. The cathedral is known for its impressive twin towers and beautiful stained glass windows, which attract many visitors. The cathedral serves as a prominent example of Northern European ecclesiastical architecture. It is part of the Evangelical Lutheran Church in Northern Germany and has been a center of worship for centuries. The site also features a museum that showcases its rich history and artistic heritage.