The most important ancient monument is the old city of Styberra situated on Bedem hill near Čepigovo, in the central region of Pelagonia. As early as the time of the Roman–Macedonian wars, this city was known as a base from which the Macedonian king Perseus of Macedon set out to conquer the Penestian cities. An important site in the area is Bela Crkva, west of Styberra, where the town of Alkomenai was probably located. It was a stronghold of the Macedonian kings after it was rebuilt in the early Roman period and was at the Pelagonian entrance to a pass leading to Illyria. Part of the city wall, a gate, and a few buildings of the Roman period were uncovered here in excavations. All recent finds from these sites are in the Museum of the City of Prilep.