Gallus of Bregenz was a Christian missionary and monk who lived during the 6th century. He is best known for his role in spreading Christianity in the region of Bregenz, which is located in present-day Austria. Gallus is often associated with the establishment of the Benedictine monastery in St. Gallen, Switzerland, where he played a significant part in the early Christian community. Gallus is venerated as a saint in both the Roman Catholic and Eastern Orthodox traditions. His feast day is celebrated on October 16. He is often depicted in art with a staff and a book, symbolizing his dedication to faith and education. His legacy continues to influence the cultural and religious landscape of the region.