The Monastery of Ostrog is a monastery of the Serbian Orthodox Church sitatued against an almost vertical background, high up in the large rock of Ostroška Greda, in Montenegro. It is dedicated to Saint Basil of Ostrog, who was buried here.

Ostrog Monastery, a miracle built by nature and human interaction, carved almost in its entirety in a vertically positioned mountain cliff, is today the pearl of Montenegro spirituality which is visited by more than a hundred thousand pilgrims from around the world and of travellers of all religions every year.

It is one of three most visited Christian destinations on the planet with its cave-like chapel and the Monastery complex that preserves the sanctity of Saint Basil, the Orthodox Christian Saint of Miracles.