820

Lua error in package.lua at line 80: module 'Module:Ancient Olympiads' not found.820 (DCCCXX) was a leap year starting on Sunday of the Julian calendar, the 820th year of the Common Era (CE) and Anno Domini (AD) designations, the 820th year of the 1st millennium, the 20th year of the 9th century, and the 1st year of the 820s decade.

Millennium: 1st millennium
Centuries: 8th century9th century10th century
Decades: 790s  800s  810s  – 820s –  830s  840s  850s
Years: 817 818 819820821 822 823

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