Carpocrates of Alexandria was the founder of an early Gnostic sect from the first half of the 2nd century, known as Carpocratians. As with many Gnostic sects, the Carpocratians are known only through the writings of the Church Fathers, principally Irenaeus of Lyon and Clement of Alexandria. As these writers strongly opposed Gnostic doctrine, there is a question of negative bias when using this source. While the various references to the Carpocratians differ in some details, they agree as to the libertinism of the sect, a charge commonly levied by pagans against Christians and conversely by Christians against pagans and heretics.