|729 by topic|
|Ab urbe condita||1482|
|Balinese saka calendar||650–651|
|Chinese calendar||戊辰年 (Earth Dragon)|
3425 or 3365
— to —
己巳年 (Earth Snake)
3426 or 3366
|- Vikram Samvat||785–786|
|- Shaka Samvat||650–651|
|- Kali Yuga||3829–3830|
|Japanese calendar||Jinki 6 / Tenpyō 1|
|Minguo calendar||1183 before ROC|
|Seleucid era||1040/1041 AG|
|Thai solar calendar||1271–1272|
855 or 474 or −298
— to —
856 or 475 or −297
Year 729 (DCCXXIX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. The denomination 729 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.
- Battle of Ravenna: Byzantine troops under Eutychius, exarch of Ravenna, are defeated by an Italian force, raised by Gregory II, in opposition to iconoclasm.
- An alliance between Duke Eudes of Aquitaine and Munuza, the Moorish governor of Cerdanya, is cemented by marriage to Eudes' illegitimate daughter Lampégia.
- King Osric of Northumbria nominates Ceolwulf, a distant cousin and brother of Coenred, as his successor. After Osric's death, Ceolwulf takes the throne.
- Battle of Baykand: The Umayyad Arabs narrowly escape disaster when cut off from water by the Turgesh, and push through to reach Bukhara in Transoxiana.
- Siege of Kamarja: A small Arab garrison defends the fortress of Kamarja against the Turgesh for 58 days, ending with a negotiated withdrawal to Samarkand.
Food and drink
- Chinese eating sticks are introduced in the next 20 years in Japan, where people heretofore have used one-piece pincers. The Japanese call them hashi.
- Du Huangchang, chancellor of the Tang Dynasty (or 728)
- Li Huaiguang, general of the Tang Dynasty (d. 785)
- May 9 – Osric, king of Northumbria
- Ecgberht of Ripon, bishop of Lindisfarne (b. 639)
- Nagaya, Japanese prince and politician (b. 684)
- Shen Quanqi, Chinese poet and official (b. 650)