Symphony No. 63 was composed by which Austrian Classical composer?
Symphony No. 63 (Haydn) The Symphony No. 63 in C major, Hoboken I/63, is a symphony by Joseph Haydn written sometime between 1779 and 1781. It is often known by the title of the second movement, "La Roxelane", named for Roxelana, the influential wife of Suleiman the Magnificent of the Ottoman Empire. This second movement was originally part of Haydn's incidental music for Charles Simon Favart's stage work "Soliman der zweite" (or "Les Trois Sultanes") in which Roxelana was a character.
String Quartets, Op. 64 (Haydn) Joseph Haydn's string quartets, Op. 64 is a set of six string quartets composed in 1790. Along with six earlier quartets published under the opus numbers 54 and 55, they are known as the Tost quartets, after the Hungarian violinist and later merchant Johann Tost who helped Haydn find a publisher for the works. Unlike the earlier quartets, Haydn actually dedicated the Op. 64 set to Tost in gratitude for his efforts.