Examples for pirgos in the country are the ruins in Matochina (near the Tundzha river), the tower in the Sadovo monastery and the Tower of Hrelyo in the Rila monastery built in 1335 which is completely preserved.
According to Greek mythology, Orestes, son of king Agamemnon, built this city as Orestias, at the confluence of the Tonsus (Toundja) and the Ardiscus (Arda) with the Hebrus (Maritza).