Saint Canius was a third-century bishop and hieromartyr born in Carthage. During the Diocletianic Persecution, he refused to worship idols or acknowledge the divinity of the emperor, leading to his imprisonment and torture. Despite these hardships, he continued to preach the Gospel, converting many followers through his endurance. After escaping execution during a violent storm and earthquake, he eventually settled in Atella to preach and live as a hermit, where he died in his old age.