As part of the Preußen-Museum NRW established in 1990 it was, in addition to the Preußenmuseum in Wesel, one of two locations at which the history of Prussia in Westphalia and Rhineland has been documented and displayed since the end of the 1990s. The museum is situated at an authentic site of Prussian history, the classicist defence barracks from 1829. As part of transfer of the museum to the trusteeship of the Landschaftsverband Westfalen-Lippe, reconstruction of the foundation and a fundamental redesign of the exhibition are currently being implemented. After this is completed the museum will reopen with a contemporary new presentation and modified appearance. With establishment of a modern visitor centre at the Kaiser-Wilhelm memorial and the supporting project network "Prussia in Westphalia", the topic of Prussia will simultaneously be increasingly placed into public consciousness, and the LWL-Preußenmuseum Minden will also be given an expanded field of action in the future.

The LWL-Preußenmuseum Minden has extensive collection holdings concerning a range of theme areas for the presentation of Prussian history. The exhibits of the collection contain paintings, graphic art, textiles, porcelain, miscellaneous objects and models as well as original exponents from the early 17th to 20th century.

A focus is placed on the 18th and late 19th century. The holdings are not developed historically but were collected according to topics in the 1990s. The collection strategy was aimed at reflecting all primary aspects of statehood. It includes portraits of the ruling dynasty and objects taken from administration, church, school, military, industry and economy, traffic and commerce. 

In addition to its connection to regional Westphalia, the collection holdings also reflect the history of the complete state and its provinces.