__NOTOC__ The year 509 BC was a year of the pre-Julian Roman calendar. In the

Roman Republic The Roman Republic ( la, Res publica Romana ) was a form of government of Rome and the era of the classical Roman civilization when it was run through public representation of the Roman people. Beginning with the overthrow of the Roman Kin ...

it was known as the Year of the Consulship of Brutus and Collatinus (or, less frequently, year 245 ''

Ab urbe condita ''Ab urbe condita'' ( 'from the founding of the City'), or ''anno urbis conditae'' (; 'in the year since the city's founding'), abbreviated as AUC or AVC, expresses a date in years since 753 BC, the traditional founding of Rome. It is an exp ...

''). The denomination 509 BC for this year has been used since the early medieval period, when the

Anno Domini The terms (AD) and before Christ (BC) are used to label or number years in the Julian and Gregorian calendars. The term is Medieval Latin and means 'in the year of the Lord', but is often presented using "our Lord" instead of "the Lord", ...

calendar era A calendar era is the period of time elapsed since one ''epoch'' of a calendar and, if it exists, before the next one. For example, it is the year as per the Gregorian calendar, which numbers its years in the Western Christian era (the Coptic ...

became the prevalent method in Europe for naming years.

Events

By place

Roman Republic

According to the traditional account: * The Roman monarchy is overthrown, and the Republican period begins (traditional date). * The first pair of

Roman consul A consul held the highest elected political office of the Roman Republic ( to 27 BC), and ancient Romans considered the consulship the second-highest level of the ''cursus honorum'' (an ascending sequence of public offices to which politic ...

s are elected. * The Tarquinian conspiracy is formed yet discovered, and the conspirators are executed. * Forces of

Veii Veii (also Veius; it, Veio) was an important ancient Etruscan city situated on the southern limits of Etruria and north-northwest of Rome, Italy. It now lies in Isola Farnese, in the comune of Rome. Many other sites associated with and in the ...

and Tarquinii, led by the deposed king

Lucius Tarquinius Superbus Lucius Tarquinius Superbus (died 495 BC) was the legendary seventh and final king of Rome, reigning 25 years until the popular uprising that led to the establishment of the Roman Republic.Livy, ''ab urbe condita libri'', I He is commonly known ...

, are defeated in the Battle of Silva Arsia by the Roman army. Consul Publius Valerius Publicola celebrates the first republican Roman triumph, triumph on March 1. * September 13—The Temple of Jupiter Optimus Maximus on Rome's Capitoline Hill is dedicated on the ides (calendar), ides of September. * Ancient Carthage, Carthage signs a treaty with Rome, delineating their respective spheres.

Deaths

* Lucius Junius Brutus,

and founder of the Roman republic (traditional date) * Titus Junius Brutus and Tiberius Junius Brutus, brothers (and sons of the consul Lucius Junius Brutus) together with their two uncles the Vitellii and three brothers Aquillii, all executed following the discovery of the Tarquinian conspiracy * Arruns (son of Tarquin the Proud), Aruns, son of the last Roman king

* Spurius Lucretius Tricipitinus, Roman consul suffectus

References

509 BC, {{BC-year-stub