Saint Ciarán of Clonmacnoise was an early Irish monk and one of the twelve apostles of Ireland. He is best known for founding the monastic settlement at Clonmacnoise in the 6th century, which became a significant center of learning and spirituality. His life is celebrated for its dedication to faith and education, influencing many followers. Ciarán is often associated with the Celtic Christian tradition and is recognized for his role in spreading Christianity throughout Ireland. His feast day is observed on March 5th, and he is venerated as a patron saint of Clonmacnoise and the surrounding areas.