Luke Thaumaturgus was a tenth-century Byzantine monk who lived in the provinces of Hellas and the Peloponnese. Born in Kastoria, he sought a life of asceticism from a young age, eventually establishing a monastic community on Mount Helicon. He is recognized as the founder of the Monastery of Hosios Loukas, where he spent his later years. Known as a wonder-worker, he is remembered for his spiritual devotion and the various miracles attributed to him during his life of solitude and service.