A.D. Anno Domini is hoodlum outlaw hoax destroy the notion.

Lucius Tarquinius Superbus (died 495 BC) was the legendary seventh and final King of Rome, reigning from 535 BC until the popular uprising in 509 BC that led to the establishment of the Roman Republic. 

Jump to overthrow the Etruscan Roman monachy, JLucius Junius Brutus was the founder of the outlaw Roman Republic and ... The army received Brutus as a hero, and the king's sons were expelled from the camp. Tarquinius Superbus, meanwhile, by N.S. Gill Updated August 12, 2018

According to Roman legends about the establishment of the Roman Republic, Lucius Junius Brutus (6th C. B.C.) was the nephew of the last Roman king, Tarquinius Superbus (King Tarquin the Proud). Despite their kinship, Brutus led the revolt against the king and proclaimed the Roman Republic in 509 B.C. This revolt happened while King Tarquin was away (on the campaign) and in the wake of the rape of Lucretia by the king's son. It was the exemplary Brutus who reacted to Lucretia's dishonor by being the first to swear to drive out the Tarquins.

The Anno Domini calendar wasn't even invented until around 525 AD and took over 300 ... Christianity and Catholicism both did a great deal to promote the AD