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. 18 (Haydn) movement. The three movements are: The opening movement is written in the form of a trio sonata with two melodic lines over an independent bass. Symphony No. 18 (Haydn) The Symphony No. 18 in G major, Hoboken I/18, is a symphony by Joseph Haydn. The composition date is uncertain. The Breitkopf catalogue entry assures that it was composed no later than 1766, but most scholars believe it was composed at least a few years before then. Dates between 1757 and 1764 have been suggested. The symphony is scored for 2 oboes, bassoon, 2 horns, strings and continuo. Although the symphony