1821January 21 – Peter I Island in the Antarctic is first sighted, by Fabian Gottlieb von Bellingshausen. January 26 – Congress of Laibach convenes in Laibach to deal with outstanding international issues, particularly the outbreak of a revolution in southern Italy. January 28 – Alexander Island, the largest in Antarctica, is first discovered by Fabian Gottlieb von Bellingshausen. February 9 – Columbian College in the District of Columbia is chartered by President James Monroe (it becomes George Washington University).
1799January 9 – British Prime Minister William Pitt the Younger introduces an income tax of two shillings to the pound, to raise funds for Great Britain's war effort in the French Revolutionary Wars. January 17 – Maltese patriot Dun Mikiel Xerri, along with a number of other patriots, is executed. January 21 – The Parthenopean Republic is established in Naples by French General Jean Étienne Championnet; King Ferdinand I of the Two Sicilies flees.
1794January 1 – The Stibo Group is founded by Niels Lund as a printing company in Aarhus (Denmark). January 13 – The U.S. Congress enacts a law providing for, effective May 1, 1795, a United States flag of 15 stars and 15 stripes, in recognition of the recent admission of Vermont and Kentucky as the 14th and 15th states. A subsequent act restores the number of stripes to 13, but provides for additional stars upon the admission of each additional state.
March 7161 – Marcus Aurelius and L. Commodus (who changes his name to Lucius Verus) become joint emperors of Rome on the death of Antoninus Pius. 1138 – Konrad III von Hohenstaufen was elected king of Germany at Coblenz in the presence of the papal legate Theodwin. 1277 – The University of Paris issues the last in a series of condemnations of various philosophical and theological theses. 1573 – A peace treaty is signed between the Ottoman Empire and the Republic of Venice, ending the Ottoman–Venetian War and leaving Cyprus in Ottoman hands.