Edict of Thessalonica

• The Edict of Thessalonica (27th Feb 380 CE) banned all other existing Religions in the Roman Empire as being incompatible with Christianity.
• The Edict was issued by Theodosius I, Gratian and Valentinian II.

The Edict banned the following:

1. Arianism
   • The Edict obliged all citizens of the Roman Empire to observe Nicene Christianity, making Arian Christianity a Heresy.
2. Ancient Egyptian Religion
   • in Egypt, and the Cult of Isis.
3. Egyptian Hieroglyphs
   • Effectively ending their use in the Classical World until they were deciphered again in 1822 by Champollion.
4. Roman Gods
   • Ending all worship of the Ancient Roman Religion, now known as Paganism.
5. Greek Pantheon
   • Ending the worship of the Ancient Greek Religion.
6. Eleusinian Mysteries,
   • These Ceremonies, which were deeply wrapped in Greek Mythology, have now been lost.