The bulwark S341/2 in Prałkowce. One of the rare extant forts which were built during the Crimean period of building Przemyśl fortress. These types of bulwarks were made on heptagonal layout. They were made of ground and wood (palisade and blockhouse). There were grounds for cannons on the banks. When the Russian threat had passed, some of the bulwark were leveled, another become substructures for more technologically complicated forts in the future.