FORT XI Stefan Batory (Elector Friedrich von Brandenburg). The main artillery fort was built in the years 1877-1884 from concrete and brick on a pentagonal plan. The facility was to be a fortified point of resistance on the left bank defense line of the city of Toruń. Fire from its 20 cannons located on open positions with service shelters could reach Cierpice and Gniewkowo. The fort was surrounded by a dry moat and earthen ramparts and well camouflaged in the terrain. The stronghold was to be defended by a crew of 650 artillerymen and one infantry battalion. It was used as barracks. During the modernization of the fort in 1894, the vaults above the barracks were covered with a meter-thick layer of concrete, the ramparts were raised so that the facility would be resistant to 150 mm caliber bullets. The vegetation covering the slopes of the fortress was supplemented. Finally, in 1911, the whole was surrounded with barbed wire.