The most famous and popular edition of Chopin's works prepared by I. J. Paderewski, L. Bronarski, and J. Turczynski. The edition has been based primarily on Chopin's autograph manuscripts, copies approved by him and first editions. The principal aim of the Editorial Committee has been to establish a text which fully reveals Chopin's thoughts and corresponds to his intentions as closely as possible. The full version of this edition includes 21 volumes.