The so-called Stone Bell House (Dům U Kamenného zvonu) is the most remarkable private residence on the Old Town Square. For a long time, this medieval fortified building (late 13C), similar to a palace, hid its true nature behind a Baroque façade. Its current look is the result of major restoration work, which reinstated its original Gothic appearance. Nowadays, it is a prestigious setting for temporary exhibitions organised by the Prague City Gallery.