St. Bartholomew, also known as Bartholomew the Apostle, is one of the twelve apostles of Jesus Christ. He is often identified with Nathanael, who is mentioned in the Gospel of John. St. Bartholomew is traditionally believed to have preached in various regions, including Armenia, and is often depicted in art holding a knife, symbolizing his martyrdom. His feast day is celebrated on August 24 in the Western Christian calendar. St. Bartholomew is recognized as the patron saint of various professions, including butchers and tanners. His legacy is honored in several churches and cathedrals, including the famous St. Bartholomew's Cathedral in Frankfurt, Germany.