The established Christian church in England, is the Church of England whose Supreme Governor is the Monarch of England. Other Christian traditions include Roman Catholicism, Methodism, and the Baptists. After Christianity, the religions with the most adherents are , , , , , , and the . There are also organisations promoting irreligion, atheist humanism, secularism, and Satanism. Other religions have been notable in the past: Celtic paganism and Druidry in Iron-Age Britain; Roman and Gallo-Roman paganism and Mithraism under the Romans, and Anglo-Saxon and Norse paganism during the Middle Ages.