In history, year 1801 has its own importance and known for many memorable events like famous birthdays, inventions, natural disaster, treaties, change of rulers, special days etc. Find below a list of important historical events which happened during the year 1801.
| Date/Month | Event / Incidence / Incident |
|---|
| 01 january | The Kingdom of Ireland formally merged with the Kingdom of Great Britain, adding St. Patrick's saltire to the Union Flag. |
| 31 january | John Marshall became the fourth Chief Justice of the UnitedStates; his court opinions would help lay the basis for American Constitutional law and made the Supreme Court a coequal branches of government. |
| 27 february | Under the District of Columbia Organic Act of 1801, Washington, D.C., a new planned city and capital of the United States, was placed under the jurisdiction of the U.S. Congress. |
| 02 april | War of the Second Coalition-British forces led by Vice AdmiralHoratio Nelson defeated the Dano-Norwegian fleet at the Battle ofCopenhagen. |
| 06 may | French Revolutionary Wars-The outmanned and outgunned HMS Speedy captured the 32-gun Spanish frigate El Gamo. |
| 12 july | French Revolutionary Wars-A squadron of British Royal Navyships of the line defeated a larger squadron of ships from the Spanish Navy and French Navy in the Gut of Gibraltar. |
| 01 august | First Barbary War-The American schooner USS Enterprise captured the Tripolitan polacca Tripoli in a single-ship action off thecoast of modern-day Libya. |
| 01 october | With the signing of the Third Treaty of San Ildefonso, Spain returned the colonial territory of Louisiana to France in return for the Tuscany area of Italy. |
| 12 July | France and Spain were defeated by Britain in the Battle of Algeciras. |
| 31 January | John Marshall was appointed as the Chief Justice of the United States. |
| 10 March | The first census was done in Great Britain. |
| 18 March | The first Ordnance Manufacturing Factory was established in India. |
| 12 April | William Cray was appointed Professor of Bengali at Fort William College, Calcutta (now Kolkata). |
| 09 February | The Treaty of Lunville ended the Second Alliance War between France and Austria. The city of Aachen was officially annexed by France under the terms of the treaty. |
| 04 March | Thomas Jefferson was sworn in as the third President of the United States. |
| 02 April | First Battle of Copenhagen Second Coalition War): The Royal Navy of the United Kingdom under Admiral Sir Hyde Parker, the Dano-Norwegian Navy was forced to accept a ceasefire. Vice-Admiral Horatio Nelson leads the main attack and deliberately instructed his commander to withdraw the army. |
| 10 May | Pasca of Tripoli declared war on the United States after hanging on the consulate. |
| 07 June | Portugal and Spain signed the Treaty of Badajoz, which resulted in Portugal losing the city of Olivenza. |
| 12 July | In the Second Battle of Algeciras, the British army defeated the French and Spanish forces. |
| 18 July | Napoleon signed a concord with Pope Pius VII. |
| 30 September | The Treaty of London was signed for the initial peace between the French First Republic and Great Britain and the United Kingdom of Ireland. |
| 17 October | A coup was organized in the Batvian Republic. |
| 16 November | First edition of the New York Earring Post printed. |
| 15 December | Haddi Mustafa Pasha, Ottoman commander and politician, was assassinated in Belgrade. |
| Date/Month | Name / Profession / Country |
|---|
| 03 November | Karl Baedeker / Author / Germany |
| 03 November | Vincenzo Bellini / Composer / Italy |
| 06 October | Hippolyte Carnot / Politician / France |
| 07 September | Sarel Cilliers / Preacher / South Africa |
| 09 May | Peter Hesketh-Fleetwood / Politician / United Kingdom |
| 10 November | Samuel Gridley Howe / Activist / United States of America |
| 10 November | Vladimir Dal / Author / Russia |
| 11 December | Christian Dietrich Grabbe / Poet / Germany |
| 12 April | Joseph Lanner / Composer / Austria |
| 12 October | Friedrich Frey-Herosé / Politician / Switzerland |
| 14 October | Joseph Plateau / Physicist / Belgium |
| 14 July | Johannes Peter Müller / Physiologist / Germany |
| 14 March | Kristjan Jaak Peterson / Poet / Estonia |
| 16 June | Julius Plücker / Mathematician / Germany |
| 21 August | Guillaume Groen van Prinsterer / Politician / Netherlands |
| 23 October | Albert Lortzing / Singer / Germany |
| 24 September | Mikhail Ostrogradsky / Physicist / Ukraine |
| 27 March | Alexander Barrow / Politician / United States of America |
| 29 January | Johannes Bernardus van Bree / Violinist / Netherlands |
| 30 June | Frédéric Bastiat / Economist / France |