Travels in Turkey Susan Daly
Troy represents many layers of civilization. Each one is built on top of the earlier one.
There was a hospital at Askelepios where the famous physician Galen practiced medicine.It specialized in treating mental illness.
When patients were admitted to this hospital, they were told that death could not enter here. They were given warm baths and encouraged to exercise. As they walked through this tunnel, they heard voices telling them they would get well. These were the physicians talking through the skylights.
The holes and the channel are to let lead flow so the column stays together.