The roof of one of the GDR-era supermarkets (HO Kaufhalle?) which you can still see all over Berlin. They’re now occupied by the various chains (Edeka, Kaisers, Rewe/Mini Mal) which colonised East Berlin, post-Wende.This one, in Warschauerstrasse, is now a Kaiser’s – I’ve already included a relief from the building in this blog.
You’ll find more examples on the corner of Holzmarktstrasse, opposite Jannowitzbrücke (A now empty Rewe) or the one on Schillingstrasse round the corner. The Kaufhallen all have the same roof design, in the same way that the Volksschwimmhalle Typ-C pools do.