The Second Treaty of Paris is signed, returning the French frontiers to their 1790 extent, imposing large indemnities, and prolonging the occupation by troops of Great Britain, Austria, Prussia, and Russia for several more years.

The Treaty of Paris of 1815, also known as the Second Treaty of Paris, was signed on 20 November 1815, after the defeat and the second abdication of Napoleon Bonaparte. In February, Napoleon had escaped from his exile on Elba, entered Paris on 20 March and began the Hundred Days of his restored rule. After France's defeat at the hands of the Seventh Coalition at the Battle of Waterloo, In defeat, Napoleon was forced to abdicate again, on 22 June. King Louis XVIII, who had fled the country when Napoleon arrived in Paris, took the throne for a second time on 8 July.

November 20 is the 324th day of the year in the Gregorian calendar; 41 days remain until the end of the year.