The octagonal water tower or "Götzenturm" - the first name comes from its location on the Danube - is a remnant of the "Götzenhof", one of the city castles that were built by high-ranking ministerials of the Babenberg princes within the city walls. The tower, as you can see it now, was built in several phases:
The Romanesque tower was built in the first half of the 13th century and originally had three floors. On the second floor, two walled battlements of the former closure can still be seen. In the second half of the 13th century, another, representative storey with round-arched bifore windows, two of which are still preserved, was added. A wooden beam used in this construction phase could be dated precisely, the spruce was felled in the winter of 1239/1240. After a partial collapse, it was rebuilt in the late Gothic period. A high entrance with a drawbridge was added to the first floor. Through this entrance you enter the tower today. Towards the end of the 15th century, a mound of earth was built around the ground floor for defense purposes and the interior was filled with earth.
Around 1940 the tower got a wooden structure with a pyramid-shaped roof.
In 2008-2011 the interior of the tower was redesigned and it got its current appearance.