1801 was a common year starting on Thursday of the Gregorian calendar and a common year starting on Tuesday of the Julian calendar, the 1801st year of the Common Era (CE) and Anno Domini (AD) designations, the 801st year of the 2nd millennium, the 1st year of the 19th century, and the 2nd year of the 1800s decade.
The Battle of Abukir of 8 March 1801 was the second pitched battle of the French campaign in Egypt and Syria to be fought at Abu Qir on the Mediterranean coast, near the Nile Delta. The landing of the British expeditionary force under Sir Ralph Abercromby was intended to defeat or drive out an estimated 21,000 remaining troops of Napoleon's ill-fated invasion of Egypt.
En 1801, varios meses después del descubrimiento del «planeta enano», el conocido filósofo alemán Hegel publicó su tesis de habilitación De orbitis planetarum, en la que describía que el sistema solar solo podía tener siete planetas, lo cual contradecía la existencia de Ceres.  Nombre