Theophilus of Caesarea was a second-century bishop who served in Caesarea Maritima. He is recognized as a teacher of Clement of Alexandria and was a prominent figure in early Christian leadership. During his tenure, he participated in the Synod of Caesarea alongside Narcissus of Jerusalem to address the Paschal controversy. He is historically noted for his stance against the Quartodecimans and for supporting the celebration of Christmas on December 25.