The Bastion III 'Kleparz' is a pearl of the defensive architecture of Kraków and Małopolska, constituting a key element of the Kraków Fortress ring. Located in the heart of the historic city centre, it is an excellent testimony to the ancient traditions of masonry architecture and to the region's rich fortification and engineering heritage. Its fortress architecture and the cultural and educational activities organised on its premises attract not only fortification enthusiasts but also residents and tourists visiting Kraków, contributing to its popularisation and protection.

The Bastion III "Kleparz" is part of the inner ring of fortifications dating from 1856–1859, which used to run along lines similar to the former entrenchments from the time of Tadeusz Kościuszko, now corresponding to the route of Aleja Trzech Wieszczów. In its heyday, it was a bastion armed with cannons and protected by infantry, providing an important point of defence for the city. However, due to technological advances, its defensive role began to lose importance over the years. Starting in 1909, it was used mainly for barracks and storage purposes, and during the Second World War,  the Germans used it to hold Soviet prisoners of war.

The unwavering determination of Kraków's scientists' saved Bastion III 'Kleparz' from the demolitions planned in  the 1960s. Its recognition as a monument worthy of protection contributed to its adaptation to industrial and later cultural purposes. Today, one part of it houses a restaurant, while another part has been restored and used for educational and cultural purposes. This testifies to its remarkable metamorphosis from a defensive structure to an important cultural venue in Kraków.