St. Gangolf's Legend is a tale about a Christian martyr named St. Gangolf, who is believed to have lived in the 7th century. According to the legend, he was a nobleman who was betrayed and murdered by his wife, Gundelind, due to jealousy. After his death, miraculous events occurred, leading to his recognition as a saint. The legend emphasizes themes of faith, betrayal, and divine justice. St. Gangolf is often depicted in art and literature, and his story has inspired various local traditions and festivals, particularly in regions where he is venerated, such as Germany and Austria.