Asen's Fortress, identified by some researchers as Petrich, is a medieval fortress in the Bulgarian Rhodope Mountains, 2 to 3 kilometres south of the town of Asenovgrad, on a high rocky ridge on the left bank of the Asenitsa River. Asen's Fortress is 279 metres above sea level.
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Address Bulgaria
Coordinates 41°59'11.892" N 24°52'24.6" E