Two-story building that once its eastern wall lies in the very defensive wall. At the beginning of XV century except defense towers in the city there called tsekauz (Arsenal), which was demolished in 1554 year and a year later built a large capital building for warehouse and manufacturing weapons. On the north side it is adjacent to a small octagonal tower. Above the main entrance to the arsenal were once different inscriptions. One of them said: "Lucky Town, which in a calm worries about future security." From the street Brothers Rohatyntsiv on the wall contained arms of Lviv, Sobieski (mark the victory over the Turks in 1683) and S. Yablonowski, which was believed to have done much to strengthen the city. When the Austrians took the Lions (1772), fit in the arsenal of prison, and in 1800 there have military warehouse. Since 1582 when the arsenal (by the modern street. Rohatyntsiv Brothers) there was a workshop for casting cannons, builders constructed Sebastian Mochyhemboyu. The second floor served for storage arsenal arsenal is zerna.Teper Lviv History Museum: here in 1981 after restoration was opened Museum of Weapons Arsenal. In Lviv architect-restorers Andrew and Anna Nowakowski Nowakowski shoe tower reconstructed with a fragment of the City defensive wall.