Siege of Constantinople (626)
The capital holds while Heraclius fights deep in Persia
In the summer of 626 the Avar khagan and his Slavs besieged Constantinople from the European shore while Shahrbaraz's Persian army stood on the Asian side. The Byzantine fleet sank the Slav boats in the Golden Horn and the siege failed, though Emperor Heraclius and his army were far away in the Caucasus.
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Meanwhile around the world (±25 years)
Middle East
- 622 Hijra: Muhammad's migration to Medina — 4 years earlier
- 630 Conquest of Mecca — 4 years later
- 636 Battle of the Yarmuk — 10 years later
- c. 636–651 Battle of al-Qadisiyyah and the Arab conquest of Persia — 10 years later
Asia
- 605–610 Grand Canal of China — 21 years earlier
- 618 Founding of the Tang dynasty — 8 years earlier
- 628 Brahmagupta and the rules of zero — 2 years later
- 629–645 Xuanzang's journey to the West — 3 years later
Alive at the time
- Muhammad (aged 56)
- Ali ibn Abi Talib (aged 26)
- Pakal the Great (aged 23)
- Wu Zetian (aged 2)
- Emperor Taizong of Tang (aged 28)
- Xuanzang (aged 24)