The church can be visited
Nikolai Church

The St. Nicholas Church (Nikolaikirche) in Rostock, one of the oldest hall churches in the Baltic Sea region, is dedicated to Saint Nicholas.
History+
Construction of St. Nicholas Church began around 1230 on a fieldstone foundation as a brick church. The first documentary mention occurred in 1257, with its consecration in 1312. In the 15th century, the church was extended with a choir and a bay of the nave to the west, complemented by a square tower. A special feature is the archway (Schwibbogen) beneath the choir, a street passage that remains preserved to this day. In 1703, a hurricane destroyed the originally slender, Gothic spire, which was replaced in 1706 by a pyramid roof with a Baroque lantern. During World War II, in the bombings of April 1942, the tower and nave completely burned out, and the nave's vault collapsed.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: https://commons.wikimedia.org/wiki/File:Rostock_St._Nikolai_Kirche.jpg
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 54.0878, 12.1464