Slightly above the monastery of the Taxiarchs is found St. Leontios' place of asceticism. He was born around 1377 in Monemvasia of Laconia, and was a descendant of an aristocratic family, family of the Paleologos emperors of Byzantium. His name (before becoming a monk) was Leo [or Leon]. His parents were eminent and God-loving people. His mother seems to have been Theodora, the daughter of the Emperor Andronikos, and his father, Andreas, was had the office of Governor General throughout the Peloponnese.
Leo was nurtured carefully and quickly managed to distinguish himself for his sharp mind and pure life. Along with the acquisition of knowledge, he worked towards spiritual cultivation, being nurtured on the Scriptures and the texts of the holy fathers.
Later he was sent by his parents to Constantinople for more advanced studies. With youthful enthusiasm and remarkable dedication he studied science, and more so philosophy. Within a short time he showed such progress that even his teachers were in awe. But his father's death soon forced Leon to return from Constantinople to his birthplace of Monemvasia to help and comfort his mother.
Theodora, when she saw that her son had lonesome tendencies [or yearnings for the monastic life], urged her son to get married and take care of a large home of inheritance. And when it would be possible, he could leave all worldly things, clothe himself in the monastic garb, and according to tradition, pass onto the left bank of the river Selinounta, where the monastery of of Panagia the "Hope of the Hopeless" was (and today is the Monastery of Pepelenitsas). In Leon's heart burned the overwhelming desire to dedicate himself to God. Nothing on earth could quench it. And later as it was agreed to by wife, who agreed to take care of family matters and raise their three children, around 1410, he entered the chorus of ascetics under the guidance of Fr. Mennidis the monk, and took the name Leontios at his monastic tonsure. [Note: Another account says that his wife and three children died before he sought the monastic life.]
His life was prayer, and his daily care to seek God. He stayed with Fr. Mennidis for a long time, and later left for Mount Athos to seek other venerable elders.
Having lived there for some time and becoming manly in virtue, he returned to the Peloponnese and sought a place of solitary asceticism. He prayed day and night for God to reveal to him were he should live. The author of his synaxarion notes: "It was revealed to him that he should head north, to the mountain known as Klokon the Elder, above Aigio."
In this craggy space he built a small church dedicated to the Archangel Michael, which became known not only in the immediate area, but all over Greece, and even reached Thomas and Demetrios Palaeologus, who in his honor, offered the means to establish a majestic monastery in Leontios' place of asceticism, Kloko.