The Symphony No. 91 in E♭ major, Hoboken I/91, was written by Joseph Haydn. It was completed in 1788 as part of a three-symphony commission from Comte d'Ogny for the Concerts de la Loge Olympique, a successor to Haydn's series of "Paris symphonies". It is occasionally referred to as The Letter T referring to an older method of cataloguing Haydn's symphonic output.[citation needed]

Date of composition 1788
Type Symphony
Tonality E-flat Major
Catalogue Hob. I:91
Approx. duration 25 minutes
Instruments Orchestra
Links
Autotranslations beta Joseph Haydn: Symphonie n°91 en mi bémol majeur, Hob. I:91 "The Letter T"
Franz Joseph Haydn: Sinfonia n. 91 in mi bemolle maggiore, Hob. I:91 "The Letter T"
Joseph Haydn: Sinfonie Nr. 91 Es-dur, Hob. I:91 "The Letter T"