<Dl> <Dt> 20th century </Dt> </Dl> <P> In the 20th century, composers continued to write masses, in an even wider diversity of style, form and function than before . </P> <Ul> <Li> Requiem Mass by Herbert Howells </Li> <Li> Requiem by Maurice Duruflé </Li> <Li> Mass in G by Francis Poulenc </Li> <Li> Messe Solennelle by Jean Langlais </Li> <Li> Glagolitic Mass (1926) by Leoš Janáček </Li> <Li> Mass in G minor by Ralph Vaughan Williams </Li> <Li> Mass, Op. 130 for choir and brass by Joseph Jongen (1945) </Li> <Li> Mass by Igor Stravinsky </Li> <Li> Mass by Leonard Bernstein </Li> <Li> War Requiem by Benjamin Britten </Li> <Li> Requiem, for soprano and mezzo - soprano solo, mixed chorus and orchestra (1963--65) by György Ligeti </Li> <Li> Requiem by Andrew Lloyd Webber </Li> <Li> Mass in F Minor by The Electric Prunes </Li> <Li> Mass by David Maslanka </Li> <Li> Berliner Messe and Missa Syllabica by Arvo Pärt </Li> <Li> Mass by Frank Martin </Li> <Li> A Symphonic Mass by George Lloyd </Li> <Li> Missa Laudate Pueri by Bertold Hummel (1) </Li> <Li> Mass of the Children, Requiem, and Gloria by John Rutter </Li> <Li> Mass To Hope by Dave Brubeck </Li> <Li> Misa Criolla by Ariel Ramírez </Li> <Li> Misa by Rodrigo Prats </Li> <Li> New Plainsong Mass by David Hurd </Li> <Li> Mass in Honor of St. Cecilia by Lou Harrison </Li> <Li> African Sanctus by David Fanshawe </Li> <Li> Polish Requiem by Krzysztof Penderecki </Li> <Li> Missa Luba by Guido Haazen </Li> <Li> Missa supra Parsifal (1985) by Dimitri Aguero </Li> </Ul> <Li> Requiem Mass by Herbert Howells </Li>

How many settings of the memorial acclamation are there