Felix I was a Roman bishop who served as pope from 269 until his death in 274. A native of Rome, he succeeded Dionysius and is primarily remembered for his theological work regarding the unity of the person of Christ. During his leadership, he engaged in a significant dispute involving Paul of Samosata, a heretical bishop of Antioch. By seeking the assistance of Emperor Aurelian, Felix helped ensure that orthodox doctrine prevailed in the conflict. He is venerated as a saint in the Catholic, Anglican, and Orthodox traditions.