'''Piano Sonata in E-flat major''', Hob. XVI/52, L. 62, was written in 1794 by Joseph Haydn. It is the last of Haydn's piano sonatas, and is widely considered his greatest. It has been the subject of extensive analysis by distinguished musicological personages such as Heinrich Schenker and Sir Donald Tovey, largely because of its expansive length, unusual harmonies and interesting development.Heinrich Schenker, "Haydn: Sonate Es-Dur," Tonwille 1 (1922), 3-21. Donald Tovey "Haydn, Pianoforte Sonata in E-Flat, No. 1" (1900) in ''Essays in Musical Analysis: Chamber Music'' (Oxford, 1944, repr. 1972), 93-105; Lawrence Moss, "Haydn's Sonata Hob. XVI:52 (ChL. 62) in E-Flat Major: An Analysis of the First Movement," in Haydn Studies, ed. Jens Larsen, Howard Serwer, & James Webster (New York & London, 1981), 496-501. The sonata is sometimes referred to as number 62 based on the numbering of Landon instead of the numbering of Hoboken.See List of solo piano compositions by Joseph Haydn#Piano sonatas to see both Hoboken and Landon numbering schemes in a single table.