Poznań Fortress

set of fortifications in the city of Poznań in western Poland

Poznań Fortress (in Polish: Twierdza Poznań, in German: Festung Posen) was a set of fortifications in the city of Poznań in western Poland, built under Prussian rule in the 19th and early 20th centuries. It was one of largest systems of its kind in Europe.

Fort IVa
Cathedral Lock