274 BC

Millennium:	1st millennium BC
Centuries:	4th century BC 3rd century BC 2nd century BC
Decades:	290s BC 280s BC 270s BC 260s BC 250s BC
Years:	277 BC 276 BC 275 BC 274 BC 273 BC 272 BC 271 BC

274 BC in various calendars

Gregorian calendar	274 BC CCLXXIV BC
Ab urbe condita	480
Ancient Egypt era	XXXIII dynasty, 50
- Pharaoh	Ptolemy II Philadelphus, 10
Ancient Greek era	126th Olympiad, year 3
Assyrian calendar	4477
Balinese saka calendar	N/A
Bengali calendar	−866
Berber calendar	677
Buddhist calendar	271
Burmese calendar	−911
Byzantine calendar	5235–5236
Chinese calendar	丙戌年 (Fire Dog) 2424 or 2217     — to — 丁亥年 (Fire Pig) 2425 or 2218
Coptic calendar	−557 – −556
Discordian calendar	893
Ethiopian calendar	−281 – −280
Hebrew calendar	3487–3488
Hindu calendars
- Vikram Samvat	−217 – −216
- Shaka Samvat	N/A
- Kali Yuga	2827–2828
Holocene calendar	9727
Iranian calendar	895 BP – 894 BP
Islamic calendar	923 BH – 921 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2060
Minguo calendar	2185 before ROC 民前2185年
Nanakshahi calendar	−1741
Seleucid era	38/39 AG
Thai solar calendar	269–270
Tibetan calendar	阳火狗年 (male Fire-Dog) −147 or −528 or −1300     — to — 阴火猪年 (female Fire-Pig) −146 or −527 or −1299

Year 274 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Dentatus and Merenda (or, less frequently, year 480 Ab urbe condita). The denomination 274 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.

Events

By place

Greece

• Pyrrhus returns from Italy and Sicily and invades Macedonia defeating Antigonus II Gonatas at the Battle of the Aous and conquering Upper Macedonia and Thessaly while Antigonus holds onto the coastal Macedonian towns. Antigonus' troops desert him and Pyrrhus is declared King of Macedonia.

Roman Republic

• The Romans under Manius Curius Dentatus conquer the Lucanians.

Egypt

• Magas of Cyrene marries Apama, the daughter of Antiochus and uses his marital alliance to foment a pact to invade Egypt. He opens hostilities against his half brother Ptolemy II, by declaring his province of Cyrenaica to be independent and then attacks Egypt from the west as Antiochus I takes the Egyptian controlled areas in coastal Syria and southern Anatolia, after which he attacks Palestine.
• Magas has to stop his advance against Ptolemy II due to an internal revolt by the Libyan Marmaridae nomads.