Joseph Haydn's Symphony No. 31 in D major, Hob. I/31, was composed in 1765 for Haydn's patron Nikolaus Esterházy. It is nicknamed the "Hornsignal Symphony", because it gives a prominent role to an unusually large horn section of four players. Probably because of its prominent obbligato writing for the horns, in Paris, the publisher Sieber published this symphony as a "symphonie concertante" around 1785.[1]