1820Au: Degawd
18g - 19g - 20g 1770au 1780au 1790au 1800au 1810au - 1820au - 1830au 1840au 1850au 1860au 1870au 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829
Digwyddiadau a Gogwyddion
Arweinwyr y Byd
- Pab Pïws VII
- Pab Leo XII
- Y brenin Sior IV (Deyrnas Unedig)
- Prif Weinnidog Robert Banks Jenkinson, 2ail Iarll Lerpwl (Deyrnas Unedig)
- Prif Weinidog George Canning (Deyrnas Unedig)
- Prif Weinidog Frederick John Robinson, Is-Iarll 1af Goderich (Deyrnas Unedig)
- Prif Weinidog Arthur Wellesley, Dug 1af Wellington (Deyrnas Unedig)
- Arlywydd James Monroe (Unol Daleithiau)
- Arlywydd John Quincy Adams (Unol Daleithiau)
- Y Brenin Lewis XVIII (Ffrainc)
- Y Brenin Siarl X (Ffrainc)
- Yr Ymerawdwr Ffransis II (Awstria)
- Tsar Alexander I (Rwsia)
- Tsar Nicholas I (Rwsia)
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