Paisiello at the clavichord, by Élisabeth Vigée Le Brun, 1791. The score is Nina, o sia La pazza per amore.
Giovanni Paisiello (or Paesiello; 9 May 1740 – 5 June 1816) was an Italian composer of the Classical era, and was the most popular opera composer of the late 1700s. His operatic style influenced Mozart and Rossini, and his music was championed by Haydn and Beethoven.