G-flat major
Although most composers prefer to use the enharmonic equivalent B major, since it only contains five sharps as opposed to C-flat major's seven flats, the middle section of Frédéric Chopin's "Contredanse" in G-flat major is written in C-flat major, as are the middle (Trio) sections of two of Ernesto Nazareth's Brazilian tangos for piano, "Chave de Ouro" and "Labirinto" (both with a home key of G-flat major), as well as the final half (last two themes) of William Bolcom's rag for piano, "Seabiscuits".