[862] In perpetŭam memorĭam (lat.), zum ewigen Gedächtnis; in perpetŭum, auf immer.
Brockhaus-1911: Ad perpetuam memoriam · In memoriam
Herder-1854: ad perpetuam rei memoriam
Meyers-1905: In perpetŭam reĭ memorĭam · Ad perpetŭam memorĭam · Post homĭnum memorĭam · In memorĭam
Pierer-1857: Ad perpetuam memoriam · In perpetŭam rei memorĭam · Post homĭnum memorĭam · Ad futuram memoriam