'''Cello Concerto No. 1 in C Major''', Hob. VIIb/1, by Joseph Haydn was composed around 1761-65 for longtime friend Joseph Franz Weigl, then the principal cellist of Prince Nicolaus's Esterházy Orchestra. ISMN M-006-20254-6
The work was presumed lost until 1961, when musicologist Old\u0159ich Pulkert discovered a copy of the score at the Prague National Museum. ISMN M-006-20254-6 Though some doubts have been raised about the authenticity of the work, most experts believe that Haydn did compose this concerto.