This stained glass window piece is the Quatrefoil Roundel with Arms and Secular Scenes, a German work created in Nuremberg between 1490 and 1500.
Central Motif: Features the double-headed imperial eagle bearing the arms of Austria on its breast.
Secular Scenes: The four surrounding lobes depict lively medieval vignettes, including trumpeters, horsemen, and figures of jesters or fools.