Marienberg Fortress [SEP] located next to body of water
Marienberg Fortress
Marienberg Fortress (German: "Festung Marienberg") is a prominent landmark on the left bank of the Main river in Würzburg, in the Franconia region of Bavaria, Germany. The mighty Fortress Marienberg is a symbol of Würzburg and served as a home of the local prince-bishops for nearly five centuries. It has been a fort since ancient times. Most of the current structures originally were built in Renaissance and Baroque styles between the 16th and 18th centuries. After Gustavus Adolphus of Sweden conquered the area in
Marienkirche, Würzburg
The Marienkirche, Würzburg (Saint Mary's Church) is a chapel located in the inner court of Marienberg Fortress in Würzburg, Bavaria. The first Christian church at this location was built in 706 by Duke Hedan II. The structure of today's building can be traced back to the early 11th century. It is the oldest church in Würzburg and the oldest building in the fortress. 
History.
Duke Hedan II erected a small church in the year 706, which was dedicated to the virgin Mary