St. Illtud was a prominent figure in early Christian history, known for founding the monastic community at Llantwit Major in Wales. He is often regarded as a key figure in the spread of Christianity in the region during the 6th century. His teachings and leadership attracted many followers, contributing to the establishment of monasticism in Britain. He is also associated with several notable students, including Saint David, who later became the patron saint of Wales. St. Illtud's legacy is celebrated in various churches and institutions, and his feast day is observed on November 6th, honoring his contributions to the Christian faith.