St Mark of Athens (4th c.)

He was born in Athens of pagan parents, but believed and was baptized, and, forsaking everything, lived as a hermit in the desert beyond Egypt. He did not see another human being for ninety-five years, and we would know nothing of his life had not the monk Serapion come upon him. Mark was about to depart this life, and lived only long enough to tell Serapion his story. Serapion then gave him burial.