[17] Ad perpetŭam memorĭam (lat.), zum immerwährenden Gedächtnis, zum ewigen Angedenken.
Brockhaus-1911: In 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