The old town (Staré Mesto) is dominated by the castle ("Hrad"), which is one of the most interesting ancient structures in Slovakia. Archeological finding indicate that a large fortified castle had already stood here at the time of Samo's Empire, in the seventh century. Archaeological findings prove the existence of a church from the ninth century beneath the more recent Gothic St. Emmeram's Cathedral. The construction of the stone castle began during the 9th century during the reign of the Prince of Nitra Svätopluk. The castle currently serves as the seat of one of Roman Catholic bishoprics in Slovakia, which was founded in 880 as the first bishopric of western and eastern Slavs, which continued its existence since then, with the break from the 10th century until around 1110.