You searched for: “ad perpetuam rei memoriam
Ad perpetuam rei memoriam. (Latin statement)
Translation: "For the perpetual remembrance of the thing."

These words are traditionally used to open papal bulls.

Word Entries at Get Words: “ad perpetuam rei memoriam
Ad perpetuam rei memoriam.
For the perpetual remembrance of the thing.
This entry is located in the following unit: Graveyard words for a greater understanding of epitaphs (page 1)