Father Thalleleos at Karoulia with Spyros Bafaloukos (1953-2015) who then had just finished his exams to enter the Medical School of the University of Athens. He later became a cardiologist. This photo was taken by his friend Nicholas Exadaktylos in 1971. In the background the hole in the rock.
Unfortunately I have no further information about Father Thalleleos. If you know more, please react.
Father Thalleleos by dr. Nicholas Exadaktylos who recently posted all his 1971 Athos photo’s here. A very nice collection!
Nicholas Exadaktylos, Mount Athos 1971 at the age of 24.
In May 2017 I took this photo of a hermit at Karoulia. It is almost the same spot as the images above. 
This is the location of the ” hole in the rock” at Karoulia. Photo by me taken from the ferry in 2015.
Herman Voogd
The monks call this rock formation “Ear”.