Leoluca was a 9th-century monk and abbot who helped establish Italo-Greek monasticism in southern Italy. Born in Corleone, Sicily, he eventually moved to Calabria to pursue a religious life. He served as the leader of the monastery at Mount Mula and was known for his intense asceticism. Recognized as a wonderworker, he was believed to perform various miracles, including healing the sick. He is venerated as a saint in both the Catholic and Eastern Orthodox traditions.