Note 6 — Chapter I · EARLY PERSECUTIONS
Reading edition
The decretal of Siricius, five years after the execution of Priscillian, strictly enjoined celibacy on all in holy orders above the rank of a sub-deacon, and dissolved all marriages of the clergy existing at the time. Leo the Great, in the middle of the fifth century, further extended the rule so as to include the sub-deacons hitherto excepted. This was largely the cause of the split that occurred between the Greek and Latin Churches.