The Bachkovo Monastery (Bulgarian: Бачковски манастир, Bachkovski manastir, Georgian: პეტრიწონის მონასტერი, Petritsonis Monasteri), archaically the Petritsoni Monastery or Monastery of the Mother of God Petritzonitissa in Bulgaria is an important monument of Christian architecture and one of the largest and oldest Eastern Orthodox monasteries in Europe. It is located on the right bank of the Chepelare River, 189 km from Sofia and 10 km south of Asenovgrad, and is directly subordinate to the Holy Synod of the Bulgarian Orthodox Church.