St. Mary's Church or Saint Mary's Church (Danish Vor Frue Kirke) is one of the main churches in the city of Flensburg.
Today's St. Mary's Church was first mentioned in a letter of indulgence from the Danish Bishop Tycho of Aarhus on May 2, 1284. It is in the city archives in the Flensburg town hall. This letter states that the citizens have begun building the new church. A three-aisled hall church was built as a brick building in the Gothic style. It stands near the Nordermarkt, on the Große Straße, on the same spot where the previous building was, and is dedicated to Mary. It is the oldest inner-city church in Flensburg and is one of the largest and most important churches in the city.
Over time, St. Mary's Church has been repeatedly remodeled. The building, which initially had three bays, was extended by two bays to the east around 1400. Two chapels of different depths were added to each of the side aisles, with windows in three parts.
From 1730 to 1731, a tower was built on reinforced corner pillars above the western bay of the central nave and crowned with a baroque dome. Around 1780, a baroque portal was built on the south wall, and in 1788 the three naves were given a mansard roof. In 1878-1880, the baroque tower was replaced by a neo-Gothic one with a pointed helmet. The two-story sacristy was added to the north side in 1901, along with a stair tower.
Source: Wikipedia