From the founding of the City, title of a book by Titus Livius on the history of Rome, which begins with the arrival of the Trojan hero Aeneas to the Italian peninsula and the foundation of Rome by Romulus and Remo, a fact that Marco Terencio Varrón and other historians place in the 753 to . C. This expression ( a . U. C. ) was used by some historians to date events in the line of history. The Romans used to use rather the expression "after exact post reges", after the expulsion of kings, that is, the beginning of the Republic, to date the events.
