Classical music written in collaboration would include: There are also instances where a work was left unfinished at the composer's death, and was completed by another composer. In such cases, the later composer generally strives to ensure the finished product is as close as possible to the original composer's intentions, as revealed by their notes, rough drafts, or other evidence. One of the best known examples is the completion by Franco Alfano of Giacomo Puccini's opera "Turandot". There may also be a case for describing Sir Edward Elgar's Symphony No. 3 as a work by both Elgar and Anthony Payne. However, these types of works
Messa (Puccini) in 1878 and was initially conceived by Puccini as a self-contained work. Puccini never published the full manuscript of the "Messa", and although well received at the time, it was not performed again until 1952 (first in Chicago and then in Naples). However, he re-used some of its themes in other works, such as the Agnus Dei in his opera "Manon Lescaut" and the Kyrie in "Edgar". At the end of World War II, Fr. Dante Del Fiorentino purchased an old copy of the manuscript of the Messa from the Vandini family in Lucca, imagining it was the original score.