Complex sentence: In 380 Emperor Theodosius I made Christianity the Roman Empire's official religion (see Byzantine Empire and the Goths) and did enforce the edict in 392 he passed legislation prohibiting all pagan cultic worship.
Split into simpler sentences: In 380 Emperor Theodosius I made Christianity the Roman Empire's official religion (see Byzantine Empire and the Goths) and did enforce the edict. In 392 he passed legislation prohibiting all pagan cultic worship.