St. Martin in Heaven
St. Martin's Catholic Church, Gundelfingen an der Donau, Bavaria
Wearing the mitre and cope that signify his status as bishop, the saint blesses the viewer from his seat on a cloud with the angels who sang upon his entry into Heaven. The goose is one of his attributes, and other angels carry other attributes – his crozier and the cloak he gave to the poor beggar.
In the lower right is a walled city with three buildings that have towers. The city is probably not Gundelfingen, which never exceeded 600 inhabitants in the Middle Ages so would probably never have had so many towers, or even a wall. Perhaps it is Tours.
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Source: G. Freihalter via this page at Wikimedia Commons.