超絶技巧練習曲
The composition of the "Transcendental Études" began in 1826, when 15-year-old Liszt wrote a set of youthful and far less technically demanding exercises called the "Étude en douze exercices" (Study in twelve exercises), S.136. Liszt then elaborated on these pieces considerably, and the far more technically difficult exercises called the "Douze Grandes Études" (Twelve Grand Studies), S.137 were then published in 1837.