The baroque 'German Church' from 1701 was completed with an impressive domed tower in 1785; badly damaged by fire in the war it was only renovated in the 1980s. Owned by the state, the bare interior now houses an exhibition about the development of parliamentarian democracy in Germany - and how it came to fail so tragically in the last century. Be sure to see the views from the windows and the impressive building models on the top floor. Free tours in English are possible throughout the day; no booking is required for individual visitors.