What German city was the family that developed and built the 8.8 cm KwK 36 L/56 from?
8.8 cm KwK 36:  It was developed and built by Krupp. Krupp: The Krupp family (see pronunciation), a prominent 400-year-old German dynasty from Essen, have become famous for their production of steel, artillery, ammunition, and other armaments.
Essen