The Day of Provenance Research, initiated by the “Arbeitskreis für Provenienzforschung“ (Working group for provenance research), takes place once every year in April. On this day the museums present their current research strategies and principal lines of inquiry. In the DHM blog our provenance researchers shed light on their usually meticulous detective work in searching for the origin and original owners of the objects. In the second article on this topic Doris Kachel describes her current investigations on lidded glass beakers from the Ministry of Finance of the GDR that were in the collection of the Museum für Deutsche Geschichte in East Berlin and were then transferred to the collection of the Deutsches Historisches Museum.