260

260 in various calendars
Gregorian calendar	260; CCLX
Ab urbe condita	1013
Assyrian calendar	5010
Balinese saka calendar	181–182
Bengali calendar	−333
Berber calendar	1210
Buddhist calendar	804
Burmese calendar	−378
Byzantine calendar	5768–5769
Chinese calendar	己卯年 (Earth Rabbit); 2957 or 2750; — to —; 庚辰年 (Metal Dragon); 2958 or 2751
Coptic calendar	−24 – −23
Discordian calendar	1426
Ethiopian calendar	252–253
Hebrew calendar	4020–4021
Hindu calendars
- Vikram Samvat	316–317
- Shaka Samvat	181–182
- Kali Yuga	3360–3361
Holocene calendar	10260
Iranian calendar	362 BP – 361 BP
Islamic calendar	373 BH – 372 BH
Javanese calendar	139–140
Julian calendar	260; CCLX
Korean calendar	2593
Minguo calendar	1652 before ROC; 民前1652年
Nanakshahi calendar	−1208
Seleucid era	571/572 AG
Thai solar calendar	802–803
Tibetan calendar	阴土兔年; (female Earth-Rabbit); 386 or 5 or −767; — to —; 阳金龙年; (male Iron-Dragon); 387 or 6 or −766

Millennium:	1st millennium
Centuries:	2nd century; 3rd century ; 4th century;
Decades:	240s; 250s; 260s ; 270s; 280s;
Years:	257; 258; 259; 260 ; 261; 262; 263;

The humiliation of Emperor Valerian (Hans Holbein the Younger, ca. 1521)

Year 260 (CCLX) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Saecularis and Donatus (or, less frequently, year 1013 Ab urbe condita). The denomination 260 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

Roman Empire

Battle of Edessa: With a large army, said to number 70,000 men, Valerian attempts to drive the Persians back from Edessa. The Roman army is surrounded and most of its troops are killed or captured. Valerian is taken prisoner for the remainder of his life.
King Shapur I captures Valerian.^[1]
King Shapur I sends Valerian to Bishapur and uses the captured Roman army for engineering plans. They construct the Band-e Kaisar ("Bridge of Valerian").
Gallienus becomes the sole emperor of Rome; during his reign the Pannonian governor Ingenuus revolts on the Danube.
Gallienus evacuates the fortifications (limes) in the Agri Decumates (Germania Superior), covering the Black Forest area in the face of invading Alamanni.
Gallienus establishes himself at Mediolanum (modern Milan); he reorganizes the army, supported by elite cavalry, and dispatches troops to the Rhine frontier.
Postumus, Roman usurper, forms the Gallic Empire and protects the Rhine against an invasion of Germanic tribes.
Saloninus, son of Gallienus, is proclaimed Augustus by his troops. Postumus besieges Cologne, where Silvanus is praetorian prefect and Roman ruler of Gaul.
Postumus executes Saloninus and his adviser Silvanus after breaching the walls of Cologne. He is recognized as emperor and establishes his capital at Trier.
Postumus wins over all the Roman provinces west of the Alps, including Gaul, Britain and Hispania.
The Roman fort of Wiesbaden (Germany) is captured by the Alamanni.
The Franks take control over the Scheldt estuary (approximate date).

Persia

Persian king Shapur I destroys Caesarea Mazaca in Asia Minor.

China

Emperor Cao Mao of Former Wei state attempts to lead a coup against the powerful regent Sima Zhao, but he himself is killed before it comes to a confrontation.
June 2 – Cao Mao is killed in a coup d'état against Sima Zhao. The 14-year-old Cao Huan becomes ruler of Former Wei, but the Sima clan controls the state.

By topic

Art and Science

Earliest known date of chess (approximate date).

Religion

Pope Dionysius convenes a synod at Rome to demand an explanation from bishop Dionysius of Alexandria, who has been charged with separating the members of the Trinity as three distinct deities.
Paul of Samosata becomes Patriarch of Antioch.