From Stamps of the World
Rzeszów is the biggest city in southeastern Poland, with a population of 184,493 in 2014. It is located on both sides of the Wisłok in the heartland of the Sandomierska Valley. Historically, in the Austrian Galicia crownland.
Postmark in Poland
Postmarks in Austria-Hungary (1867-1918)
Postmarks in Austrian Empire Galicia province
The Polish name RZESZÓW was used when the post office opened before 1850, seat of the District.