Grande étude de perfectionnement

Étude de perfectionnement de la methode des methodes is a description applied to two pieces by the Hungarian composer Franz Liszt, composed in 1842 and 1852. The first piece is called Morceau de salon, S.142, followed by a revision, Ab Irato, S.143, both composed in E minor. They are regarded as eccentric pieces with beautiful interludes of arpeggiated figures, though both are rarely performed.