Monastery of Petra, Olympus

According to historical data, the Monastery was a stronghold and a place of revolutionary action for the revolted Greeks in 1821. At the same time, it is considered a point of reference for the establishment of monasteries that played a catalytic role in maintaining a prosperous morale, in survival during the years of the Ottoman Empire and in the independence of the nation.

In 1929, a sanatorium for indigent tuberculosis patients was built on the site of the Monastery, which operated until 1969. A year later, it was converted into a clinic for mental illnesses, maintaining this function until 2004, when it closed for good.