1805 in music

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This is a list of music-related events in 1805.

• April 7 – Beethoven's Symphony No. 3, Eroica, has its public premiere at the Theater an der Wien in Vienna under his baton, marking the beginning of his middle period.
• November 20 – Beethoven's only opera Fidelio in its original form (known retrospectively as Leonore) is premiered at the Theater an der Wien in Vienna.
• Louis Spohr is appointed musical director to the court of Gotha.
• Niccolò Paganini begins touring Europe.

• Ludwig van Beethoven
  • Piano Concerto No.4, Op. 58
  • Leonora Overture No.2, Op. 72a
  • Erlkönig, WoO 131
• ETA Hoffmann – Piano Sonatas
• Franz Krommer – Concerto for Oboe in F Major, Op. 52
• Louis Spohr
  • 2 String Quartets, Op. 4^[1]
  • Violin Concerto No. 3, Op. 7^[2]
• Joseph Wölfl
  • Piano Sonata in C minor, Op. 25
  • Three Piano Sonatas, Op. 33

• Michele Carafa – Il Fantasma^[3]
• Luigi Cherubini – Faniska
• James Hook – The Soldier's Return

• January 7 – Philip Klitz, composer (d. 1854)^[4]
• February 22 – Robert Reinick, lyricist and artist (died 1852)
• March 5 – Théodore Labarre, harpist and composer (d. 1870)
• March 17 – Manuel García, singer and music teacher (d. 1906)
• May 14 – Johan Peter Emilius Hartmann, composer (d. 1900)
• July 8 – Luigi Ricci, opera composer (d. 1859)
• July 27 – Luigi Felice Rossi, composer and musicologist (d. 1863)
• October 28 – John Thomson, composer (d. 1841)
• November 1 – Alessandro Nini, composer (d. 1880)
• November 14 – Fanny Mendelssohn, pianist and composer (d. 1847)^[5]

• January 23 – Wenzel Pichl, composer (b. 1741)
• February 4 – Johann George Tromlitz, flautist (b. 1725)
• April – Emerico Lobo de Mesquita, organist, conductor, composer and music teacher (b. 1746)
• April 28 – Peter Pelham, harpsichordist, organist and composer (b. 1721)
• May 9 – Friedrich Schiller, librettist and poet (born 1759)
• May 10 – Johann Evangelist Haydn, tenor, brother of Joseph Haydn and Michael Haydn (b. 1743)
• May 28 – Luigi Boccherini, composer (b. 1743)
• August – Ann Griffiths, hymn-writer (b. 1776)
• November – Hamoir, dancer and theatre director
• December 18 – Gennaro Astarita, opera composer (b. c.1745)