Background
Fastnacht was born to a German family who settled in the east.
Fastnacht was born to a German family who settled in the east.
He studied in Sanok, in Lwów at Lviv University under Franciszek Bujak and at the Jagiellonian University in Krakow, where in 1946 he received his Doctor of Philosophy.
He was a distinguished Polish historian, researcher of the history of the town and the district of Sanok Land, one of the most renowned Polish historians of his time. He was long-standing curator of the Ossolineum.
Fastnacht was a member of the Armia Krajowa.