The construction of St. Mary's Church was begun in 1180 under Jaromar I as a Romanesque basilica with transept. Originally it was intended as a church of power (Palatinate), but the feudal lord Jaromar had to change his plans so as not to irritate the Danish feudal lords. Consecrated in 1193 as the monastery church of the nunnery of Bergen, the church is one of the earliest brick buildings in our area. In addition, it is the oldest surviving building in Rügen. While the eastern part is Romanesque, the nave and the upper floor of the Gothic cross-building belong to it. The valuable wall painting cycle with biblical motifs, in the choir and eastern transept, comes from the Romanesque period. A baptismal font from the 14th century and the Baroque pulpit from 1776 are remarkable pieces of equipment. The altar dates from around 1730. The chandeliers date from the period after the Thirty Years' War. The large church bell is from the year 1445. Since the great city fire of 1445 it sounds over city and country. She is about 60 Ztr. Heavy, and has the inscription on the neck in Gothic minuscule script: O, rex glorie, Christ, veni cum pace! German: O Christ, King of Glory, come with peace! In the period from 1896 to 1903 was the last major restoration of the church. The murals were also restored and supplemented, which was painted over after the Reformation. In the renovation, the wooden side gallery was removed, the wooden organ gallery was replaced by one made of stone. The church has become more interesting, but has lost its acoustics. Unique is the dial of the church clock on the north side of the tower, it has a 61-minute division. In 2004, St. Mary's Church was included in the "European Route of Brick Gothic". In February 2005, the Marienkirche was included in the conservation program "Nationally valuable cultural monuments".