St. Columba was a 6th-century Irish monk and missionary known for spreading Christianity in Scotland. He founded the famous Iona Abbey on the island of Iona, which became a center for learning and religious activity. His efforts helped convert many people to Christianity and established a strong monastic tradition in the region. Columba is often celebrated for his deep spirituality and leadership qualities. He is also associated with the legendary Loch Ness Monster, as stories say he encountered the creature while on a mission. Today, St. Columba is revered as a saint in both the Catholic and Orthodox churches, with his feast day celebrated on June 9th.