Červený Kláštor (Red Monastery) was founded in the early 14th century, during the Hungarian Kingdom. Court documents from 1307 state that a man by the name of master Kokoš from Brezovica, founded six monasteries as a punishment for murder. In 1319 he donated 62 sectors of his village, Lechnice to the Carthusian order. A wooden structure was built in 1330, which was later replaced by bricks and stones. The monastery gets the name 'Red' from the red tiles that were used on the roofs.
The monastery suffered several quarrels with Czorsztyn lords, and was occupied by Hussites in 1431 and in 1433. It was adversely hit by the Battle of Mohács in 1515, and in 1545 Czorsztyn Knights from Niedzica Castle attacked the monastery, and the monks fled across the Dunajec River into Poland. The monastery was abolished during the Reformation in 1563, becoming a private residence for wealthy noblemen.
In 1699, Ladislav Maťašovský, a bishop in Nitra, purchased the monastery, and donated to the Camaldolese order, who settled down it this area in 1711. In 1782 it was secularized as part of Emperor Joseph II's campaign against monastic orders that in his view didn't pursue useful activities. The monastery’s library was sold to Budapest, and the church equipment to Muszyna, Poland.
In 1820 the Emperor Franz Joseph I donated the monastery to the newly founded Greek-Catholic diocese of Prešov.
The monastery suffered a fire in 1907 and was heavily damaged during the Second World War, but after being rebuilt in 1956–66 it was opened again and serves as a museum.
References:Herceg Novi was founded (on a former small fishing village, existing since Roman Empire times) as a fortress in 1382 by first Bosnian King Stjepan Tvrtko I and was called Sveti Stefan or Castelnuovo. The Turks conquered Herceg Novi in 1482, and ruled for 200 years, until 1687. However, there was a short pause between 1538 and 1539 when it was held by the Spaniards before they were defeated in the Siege of Castelnuovo. Turkey ruled again until 1687, from then until 1797, the town was ruled by the Venetian Republic.
The Herceg Novi old town is amazing. It is on a fairly steep hill that leads all the way down to the sea. Wandering through the small stairways to the various plazas and fortresses is a many hour adventure.