|Centuries:||7th century – 8th century – 9th century|
|Decades:||750s 760s 770s – 780s – 790s 800s 810s|
|Years:||778 779 780 – 781 – 782 783 784|
|781 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||1534|
|Chinese calendar||庚申年 (Metal Monkey)
3477 or 3417
— to —
辛酉年 (Metal Rooster)
3478 or 3418
|- Vikram Samvat||837–838|
|- Shaka Samvat||703–704|
|- Kali Yuga||3882–3883|
|Japanese calendar||Hōki 12 / Ten'ō 1
|Minguo calendar||1131 before ROC
|Seleucid era||1092/1093 AG|
|Thai solar calendar||1323–1324|
|Wikimedia Commons has media related to 781.|
Year 781 (DCCLXXXI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 781 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.
- King Charlemagne has his son Carloman (renamed Pepin) anointed "king of Italy" and is crowned by pope Adrian I with the Iron Crown of Lombardy. His younger brothers Charles I are anointed king of Aquitaine and Louis the Pious (only 3-years old) is appointed sub-king of Italy and Aquitaine.
- Charlemagne meets Alcuin, Anglo-Saxon missionary, in Italy and invites him to Aachen, where he becomes Charlemagne's chief adviser on religious and educational matters (approximate date).
- Yang Yan, Chinese statesman, commits suicide after being accused of bribery and corruption. He is credit of reforming the tax system for peasants, reducing the power of the aristocratic classes and eliminating their tax-free estates.
- April 30 – Emperor Kōnin of Japan abdicates the throne after a 11-year reign in favor of his half-Korean son Kanmu.
- July 31 – The oldest recorded eruption of Mount Fuji (Traditional Japanese date: July 6, 781).
- New city of Bian (汴) is constructed on the site of Kaifeng during the Tang Dynasty (China).
- Charlemagne defines the Papal territory (see Papal States). He codifies the regions over which the pope would be temporal sovereign: the Duchy of Rome is expanded by Ravenna, the Duchy of the Pentapolis, parts of the Duchy of Benevento, Tuscany, Corsica and Lombardy.
- Nestorians in China build Christian monasteries and erect the Nestorian Stele (approximate date).
|This section is empty. You can help by adding to it. (October 2014)|
- Alchmund, bishop of Hexham (approximate date)
- Fergus mac Echdach, king of Dál Riata (Scotland)
- Guo Ziyi, general of the Tang Dynasty (b. 697)
- Isonokami no Yakatsugu, Japanese nobleman (b. 723)
- Yang Yan, chancellor of the Tang Dynasty (b. 727)