The Tvrdoš monastery goes back to the period of the 4th to 6th centuries. It was built on the foundations of an old church and since then was torn down several times and built up again.

Frescos of Dubrovnik painter Vicko Lovrov and the monk Marko Stefanov - Trebinjac can be found there. In the first half of the 6th century the monastery was the biggest scriptorium of the Slavic south, and at the same time cultural and spiritual center of a broader area.