Beethoven and Mozart, his formal structures and his developments tend to give the impression more of melodic development than of harmonic drama. This combination of Classical form and long-breathed Romantic melody sometimes lends them a discursive style: his Great C Major Symphony was described by Robert Schumann as running to "heavenly lengths". Lieder and art songs It was in the genre of the Lied that Schubert made his most indelible mark. Leon Plantinga remarks that "in his more than six hundred Lieder he explored and expanded the potentialities of the genre, as no composer before him." Prior to Schubert's influence, Lieder tended toward a strophic, syllabic treatment of text, evoking the folksong qualities engendered by the stirrings of Romantic nationalism. Among Schubert's treatments of the poetry of Goethe, his settings of "Gretchen am Spinnrade" (D. 118) and "Der Erlkönig" (D. 328) are particularly striking for their dramatic content, forward-looking uses of harmony, and use of eloquent pictorial keyboard figurations, such as the depiction of the spinning wheel and treadle in the piano in "Gretchen" and the furious and ceaseless gallop in "". He composed music using the poems of myriad poets, with Goethe, Mayrhofer, and Schiller the most frequent, and others, including Heinrich Heine, Friedrich Rückert, and Joseph Freiherr von Eichendorff. Of particular note are his two song cycles on the poems of Wilhelm Müller, Die schöne Müllerin and Winterreise, which helped to establish the genre and its potential for musical, poetic, and almost operatic dramatic narrative. His last collection of songs, published in 1828 after his death, Schwanengesang, is also an innovative contribution to German Lieder literature, as it features poems by different poets, namely Ludwig Rellstab, Heine, and Johann Gabriel Seidl. The Wiener Theaterzeitung, writing about Winterreise at the time, commented that it was a work that "none can sing or hear without being deeply moved". Antonín Dvořák wrote in 1894 that Schubert, whom he considered one of the truly great composers, was clearly influential on shorter works, especially Lieder and shorter piano works: "The tendency of the romantic school has been toward short forms, and although Weber helped to show the way, to Schubert belongs the chief credit of originating the short models of piano forte pieces which the romantic school has preferably cultivated.... Schubert created a new epoch with the Lied.... All other songwriters have followed in his footsteps." Publication – catalogue When Schubert died he