720

Millennium:	1st millennium
Centuries:	7th century – 8th century – 9th century
Decades:	690s 700s 710s – 720s – 730s 740s 750s
Years:	717 718 719 – 720 – 721 722 723

720 by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishment and disestablishment categories
Establishments – Disestablishments

Events

The Nihon Shoki (日本書紀), one of the oldest history books in Japan, is completed.
Umayyad caliph Umar ibn Abd al-Aziz is succeeded by Yazid II ibn Abd al-Malik.
July 30—In the Tang Dynasty Chinese capital of Chang'an, the walls of a gated city ward collapse during the night, which unexpectedly form a large pool out in the open. This is most likely caused by a sinkhole created when ground water eroded the limestone bedrock beneath. As a consequence of this, more than 500 homes are destroyed (Benn, 50).

The Byzantine emperor Leo III the Isaurian orders the execution of the ex-emperor Anastasius II.