The Lira Monastery, a world cultural heritage site, located 60 km south of the Bulgarian capital Sofia, was built in the tenth century AD and has a rigorous pattern, much like a medieval castle. The Lira Monastery is the center of architecture, art, religion, engraving, education. The Bulgarian monastery was in its heyday, with tens of thousands, and later only a few hundred, and today there are only eight monastery in the Rira. The monastery has magnificent 16th century murals, 14th century residential buildings, and 10th century natural caves, all of which combine nature with human civilization, making the monastery second to none throughout the Balkans. See the world at the edge