A choral symphony is a large musical composition, generally including an orchestra, a choir and soloists, which adheres to some extent to the tenets of musical form for a symphony in its internal workings and overall musical architecture. The term "choral symphony" in this context was coined by Hector Berlioz when describing his Roméo et Juliette in his five-paragraph introduction to that work. The direct antecedent for the choral symphony is Ludwig van Beethoven's Ninth Symphony. The Beethoven Ninth incorporates part of the Ode an die Freude ("Ode to Joy"), a poem by Friedrich Schiller, with text sung by soloists and a chorus in the last movement. It is the first example of a major composer using the human voice on the same level with instruments in a symphony. While Berlioz, Felix Mendelssohn and Franz Liszt followed in Beethoven's footsteps, it was with the advent of the 20th century that the choral symphony seemed to come into vogue, with notable works by Benjamin Britten, Gustav Mahler, Sergei Rachmaninoff, Dmitri Shostakovich, Igor Stravinsky and Ralph Vaughan Williams, among others.