the 15th to the 20th centuries, on display in over 20 Prussian palaces. Their present conditions reflect the eventful histories of the palaces and their interiors, which have experienced various uses, changes [...] changes of ownership, and war-caused losses and damage, but also new acquisitions and restitutions. Thus, the spectrum of forms of presentation ranges from originally preserved room ensembles to museum-style [...] collection is cared for and maintained at two locations, by seven staff members (at Charlottenburg Palace in Berlin, and at the Science and Restoration Center in Potsdam). Preservation, care and research