The former monastery church of St. Peter and Paul is one of the most important Romanesque church buildings in Thuringia, despite considerable alterations to its substance in the 19th century. As the spiritual center of St. Peter's Monastery, which occupied an outstanding position among the Thuringian monasteries, it shaped the silhouette of the city of Erfurt for centuries.

The monastery suffered serious destruction during the Napoleonic Wars. As a result, the monastery church was dismantled and used as a storehouse for provisions. St. Peter's Church was partially renovated for BUGA 2021 and is now once again an important focal point on the Petersberg. 

The special exhibition "Paradise Gardens - Garden Paradises" shows the imaginative ideas of paradise, which are reflected in the design of gardens as paradises on earth. Starting with the gardens of the defunct St. Peter's Monastery, the exhibition sheds light on medieval garden culture and presents the development of courtly garden design in Thuringia.