Schleswig Cathedral

Schleswig Cathedral officially the Cathedral of St. Peter at Schleswig, is the main church of the city of Schleswig and was the cathedral of the Bishop of Schleswig until the diocese was dissolved in 1624. It is now a church of the North Elbian Evangelical Lutheran Church, the seat of the Lutheran Bishop of Schleswig and Holstein, and ranks among the most important architectural monuments of Schleswig-Holstein.

Source: Wikipedia