Mark of Aviano was a 17th-century Italian Capuchin friar who served as a significant religious and political figure during the wars against the Ottoman Empire. Born Carlo Domenico Cristofori in Aviano, he joined the Capuchin order in 1648 and was ordained in 1655. He gained widespread recognition for his preaching and his role as a mediator and advisor to Holy Roman Emperor Leopold I. His influence extended to the military campaigns of the Holy League, where he worked to maintain unity and morale among the allied forces.