Schlossturm Düsseldorf

The castle tower is also a maritime museum - very interesting. There is a café on the top floor, from where you have a gigantic view over the Rhine and all the way to the Media Harbour.

The castle tower originally formed the northern end of the Düsseldorf Castle. The first three floors of the tower date back to the 13th century. In 1552 Alessandro Pasqualini added a fourth polygonal floor to the tower, decorated with Tuscan columns. The idea of a fifth floor came from King Friedrich Wilhelm IV. His court architect Friedrich August Stüler implemented it in 1845 in the so-called round arch style.[1] In 1883 a new portal was added to the tower by Eberhard Westhofen. The round arches on the fifth floor were also glazed. In 1909, when a tent roof was built, the tracery attic was removed. Today's tent roof dates from 1950.[2] The Maritime Museum has been housed in the tower since 1984. In 2001 the tower received a new interior design. Overall, the height of the castle tower is 33 meters.
Source: Wikipedia

What few know - in the lantern in the castle tower you can enjoy coffee and cake during the day with a beautiful view of Düsseldorf and the Rhine.
restaurant-rossini.de/laterne.htm