I’m constantly amazed by how young America is. We have plenty of history but its not impressive the way “this town celebrated is 1000th birthday” is impressive. Greece is full of old. Looking at the UNESCO world heritage list for Greece is like reading the test prep for world history.
Many religious communities have lived in this area over the centuries. The monastic order that built the monasteries and lives there today arrived in the mid-14th century. They served as a bulkhead of Orthodox Christianity in Greece.