**Ad orientem** (Latin for "to the east") is a phrase used to describe the orientation of Christian prayer and worship, where the priest and the people face the same direction, usually towards the east². This is also how Catholics have traditionally worshipped the Lord¹.
There is no official document that mandates or forbids ad orientem worship in the Ordinary Form of the Mass. However, there are some guidelines and instructions on how to celebrate Mass ad orientem in a reverent and proper way³.
source
Some priests are going...backwards?
Moderators:johnmc, Johnna, MarieT, Denise
"He who followeth Me, walketh not in darkness." sayeth the Lord