509 BC

Millennium:	1st millennium BC
Centuries:	7th century BC 6th century BC 5th century BC
Decades:	520s BC 510s BC 500s BC 490s BC 480s BC
Years:	512 BC 511 BC 510 BC 509 BC 508 BC 507 BC 506 BC

Politics
509 BC by topic
State leaders Political entities
Categories
Deaths
v t e

509 BC in various calendars
Gregorian calendar	509 BC DVIII BC
Ab urbe condita	245
Ancient Egypt era	XXVII dynasty, 17
- Pharaoh	Darius I of Persia, 13
Ancient Greek era	67th Olympiad, year 4
Assyrian calendar	4242
Balinese saka calendar	N/A
Bengali calendar	−1101
Berber calendar	442
Buddhist calendar	36
Burmese calendar	−1146
Byzantine calendar	5000–5001
Chinese calendar	辛卯年 (Metal Rabbit) 2188 or 2128 — to — 壬辰年 (Water Dragon) 2189 or 2129
Coptic calendar	−792 – −791
Discordian calendar	658
Ethiopian calendar	−516 – −515
Hebrew calendar	3252–3253
Hindu calendars
- Vikram Samvat	−452 – −451
- Shaka Samvat	N/A
- Kali Yuga	2592–2593
Holocene calendar	9492
Iranian calendar	1130 BP – 1129 BP
Islamic calendar	1165 BH – 1164 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1825
Minguo calendar	2420 before ROC 民前2420年
Nanakshahi calendar	−1976
Thai solar calendar	34–35
Tibetan calendar	阴金兔年 (female Iron-Rabbit) −382 or −763 or −1535 — to — 阳水龙年 (male Water-Dragon) −381 or −762 or −1534

The year 509 BC was a year of the pre-Julian Roman calendar. In the Roman Republic it was known as the Year of the Consulship of Brutus and Collatinus (or, less frequently, year 245 Ab urbe condita). The denomination 509 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

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Transcription

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 consuls are elected.
The Tarquinian conspiracy is formed yet discovered, and the conspirators are executed.
Forces of Veii and Tarquinii, led by the deposed king Lucius Tarquinius Superbus, are defeated in the Battle of Silva Arsia by the Roman army. Consul Publius Valerius Publicola celebrates the first republican triumph on March 1.
September 13—The Temple of Jupiter Optimus Maximus on Rome's Capitoline Hill is dedicated on the ides of September.
Carthage signs a treaty with Rome, delineating their respective spheres.^[1]