St. Coman of Roscommon was an early Irish saint, believed to have lived in the 6th century. He is known for founding the monastery of Roscommon, which became an important center for Christian learning and worship in Ireland. His life is celebrated for promoting Christianity in the region and for his dedication to monastic life. The feast day of St. Coman is observed on September 21. His legacy includes the influence he had on the spread of Christianity in Connacht, as well as the establishment of various churches and communities that followed his teachings. St. Coman is often remembered for his piety and commitment to the monastic tradition.