Bachkovo monastery is Bulgaria's second largest and is UNESCO world monument. On all sides, the monastery is surrounded by the hills of the Rhodopes mountains. It lies in the valley of the Chepelare river (also known as Chaya), about 10km to the south of the town of Assenovgrad. It was founded in 1083 by two Georgians. The monastery consists of two separate courtyards. In the first one, the main church, Sveta Bogoroditsa, is the oldest surviving building of the monastery, built 1604. In the second courtyard stands Sveti Nikolai whose porch Judgement Day fresco was painted by Zahari Zograf (including a selfportrait of the artist), finished in 1841.