Caecilius of Elvira was a first-century Christian missionary and the inaugural bishop of Iliberri, the ancient site of modern-day Granada. According to tradition, he was part of the Seven Apostolic Men, a group of clerics ordained by Peter and Paul in Rome to evangelize the Iberian Peninsula. He is credited with founding the archdiocese of Granada and is remembered as a martyr who died during the reign of Nero.