29 March — German composer Ludwig van Beethoven gave his first concert in Vienna.
7 April — in France, a law was adopted that introduced the metric system and defined the units of length—the metre—and mass—the kilogram.
15 April — Lithuania’s annexation by Russia.
26 April — Russia annexed Courland.
15 August — in France, a new currency was introduced—the franc.
21 August — after being unemployed for two months, Napoleon entered service at the Topographical Bureau.
25 November — on the name day of Catherine II, the last King of Poland, Stanisław August Poniatowski, abdicated the throne.