The Warsaw Citadel was built by the Russian Empire in the 19th century after the November Uprising, less as a city defence than as a way to control Warsaw. Its walls and gates still carry the weight of that occupation.
The site is closely tied to Polish independence history: many political prisoners were held or executed here, including figures from the January Uprising. It is a sober stop, best approached as part of Warsaw's wider story of occupation, resistance, and memory.