The “Academia Petrina” in the city of Jelgava (former German name: Mitau), then capital of the Courland Governorate in the Russian Empire, today in Latvia. It was founded as a secondary school in 1775 and served as German army headquarters in World War I.
1915 or earlier (postmark: November 22, 1915)
c. 8,5×8 cm, card c. 14×9 cm
[front:] Mitau. Kommandantur.