|Covid-19|Monarch – Nicholas I
Third Section of His Imperial Majesty's Own Chancellery
December 1 (November 19 O.S.) – Nicholas I of Russia succeeds his brother Alexander I.
December 26 (December 14 O.S.) – 3000 Imperial Russian Army officers stage the Decembrist Revolt against Nicholas's accession in Saint Petersburg. The rebellion, however, is successfully suppressed by the government.
1825 in Russia Wikipedia
Events from the year 1825 in Russia