The Sinaia Monastery, founded by Prince Mihai Cantacuzino in 1695 and named after the great Sinai Monastery on Mount Sinai, in the Sinai Peninsula. It was the residence of the royal family until the present castle was built, and is now inhabited by 20 Christian Orthodox monks.
      The monastery consists of two courtyards surrounded by low buildings.
In the centre of each courtyard there is a small church built in the Byzantine style.