Symphony instruments, 19th century symphonies were gradually augmented with more string players and more wind parts, so that the orchestra grew substantially in sheer numbers, as concert halls likewise grew. At the beginning of the 20th century, Gustav Mahler wrote long, large-scale symphonies. His Eighth Symphony, for example, was composed in 1906 and is nicknamed the "Symphony of a Thousand" because of the large number of voices required to perform the work. Additionally, his Third Symphony is one of the longest regularly performed symphonies at around 100 minutes in length for most performances. The 20th century also saw further diversification in
Symphony No. 4 (Schumann) Symphony No. 4 (Schumann) The Symphony No. 4 in D minor, Op. 120, composed by Robert Schumann, was first completed in 1841. Schumann heavily revised the symphony in 1851, and it was this version that reached publication. Clara Schumann, Robert's widow, later claimed on the first page of the score to the symphony—as published in 1882 as part of her husband's complete works ("Robert Schumanns Werke, Herausgegeben von Clara Schumann," published by Breitkopf & Härtel)—that the symphony had merely been sketched in 1841 but was only fully orchestrated (""vollständig instrumentiert"") in 1851. However, this was untrue, and Johannes Brahms, who