ab urbe condita
/ab ˌəːbiː ˈkɒndɪtə/ /ab ˌʊəbeɪ ˈkɒndɪtə/(also ad urbe condita)
adverb
After or from the date of the foundation of Rome, traditionally reckoned as 753 b.c.
Origin
Early 17th century; earliest use found in William Segar (d. 1633), herald. From classical Latin ab urbe conditā from the founding of the city from ab + urbe, ablative of urbs + conditā, ablative feminine singular past participle of condere to found, establish.