Cataloging the State Museums of Berlin (Staatliche Museen zu Berlin, Preussicher Kulturbesitz) can be tricky. See a list of institutions here. Getty ULAN contains entries for the individual institutions, but some are in English, and some in German. See ULAN for full records, but here is a cheat sheet for common entries:

National Museums in Berlin (top of hierarchy)

• Gemaldegalerie
• Museum fur Ostasiatische Kunst / Museum of East Asian Art
• Museum of Indian Art / Museum fur Indische Kunst
• Museum of Prints and Drawings / Kupferstichkabinett
• Pergamon Museum / Pergamonmuseum
• Stiftung Preussischer Kulturbesitz. Staatliche Museen - this entry is outdated, please use more specific institutions instead.

Many objects in these collections are cataloged in Artstor, under ARTstor Collections > Berlin State Museums (Staatliche Museen zu Berlin). The Preussicher Kulturbesitz also maintains its own eMuseum site which is helpful for supplying descriptive data: State Museums of Berlin collections database