In what city was Symphony No. 13, which was mistaken at one time to be created by the Father of the Symphony, written?
Symphony No. 13 (Michael Haydn): Michael Haydn's Symphony No. 13 in D major, Perger 37, Sherman 13, MH 132, believed to have been written in Salzburg in 1768, was at one time mistaken for a symphony by Joseph Haydn (Hob. Joseph Haydn:  He was instrumental in the development of chamber music such as the piano trio and his contributions to musical form have earned him the epithets "Father of the Symphony" and "Father of the String Quartet".
Salzburg