The church can be visited
Petersberg Abbey

Petersberg Monastery (formerly also: Lauterberg Monastery) is a former Augustinian canons' monastery located on the summit of Petersberg in the municipality of Petersberg near Halle in Saxony-Anhalt. It was built by Count Dedo IV of Wettin between 1124 and 1142 as a house monastery and burial site for the noble family. From 1142, construction began on the collegiate church of St. Peter, which was completed in 1184. The three-aisled cruciform basilica has an unusual floor plan due to its location on the mountain: the nave is only slightly longer than the transept, and the side aisles appear too wide. The cloister with several cellar levels was built on the mountainside.
After the Reformation, the church was almost completely destroyed by a lightning strike and subsequent fire in 1565. A new church was built, but the pillar spacing (of the nave) was set further apart.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Roland Neubert, Halle (Saale)
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Location: 51.5958, 11.9538