1816 was a leap year.
January 6 - Emperor Alexander I Romanov signs an order to expel Jesuits from St. Petersburg and Moscow.
May 11 - St. George's Assembly in Belgrade
July 9 - Argentina becomes independent from Spain.
August 14 - The United Kingdom formally annexes the Tristan de Cunha archipelago.
December 11 - Indiana becomes the 19th American state.
Wikipedia: Unknown date - Finnish Senate established.
January 27 - Samuel Hood, British Admiral
March 20 - Maria I of Portugal, Queen of Portugal
June 16 - Melentije Nikšić, Bishop of Sabac and Užice
June 24 - Constantine Ypsilanti, Greek insurgent
July 14 - Francisco Miranda, Venezuelan general, Latin American independence fighter
August 31 - Jovan Branovacki, Austrian general
Wikipedia: Unknown date - Venerable Martyr Akakije Papučar - Christian saint
List of years
List of decades
List of centuries