Year 1801 (MDCCCI) was a common year starting on Thursday (link will display the full calendar) of the Gregorian calendar and a common year starting on Tuesday of the 12-day-slower Julian calendar. It was also the first year of the 19th century.

Ludwig van Beethoven (ⁱ/ˈlʊdvɪɡ væn ˈbeɪt.hoʊvən/; German pronunciation: [ˈluːtvɪç fan ˈbeːt.hoːfən] ( listen); baptized 17 December 1770 – 26 March 1827) was a German composer and pianist. A crucial figure in the transition between the Classical and Romantic eras in Western art music, he remains one of the most famous and influential of all composers.

Born in Bonn, then the capital of the Electorate of Cologne and part of the Holy Roman Empire, Beethoven moved to Vienna in his early 20s, studying with Joseph Haydn and quickly gaining a reputation as a virtuoso pianist. His hearing began to deteriorate in his late twenties, yet he continued to compose, conduct, and perform, even after becoming completely deaf.

Beethoven was the grandson of a musician of Flemish origin named Lodewijk van Beethoven (1712–73) who moved at the age of twenty to Bonn. Lodewijk (Ludwig is the German cognate of Dutch Lodewijk) was employed as a bass singer at the court of the Elector of Cologne, eventually rising to become Kapellmeister (music director). Lodewijk had one son, Johann (1740–1792), who worked as a tenor in the same musical establishment, and gave lessons on piano and violin to supplement his income. Johann married Maria Magdalena Keverich in 1767; she was the daughter of Johann Heinrich Keverich, who had been the head chef at the court of the Archbishopric of Trier.