Pasticcio
PASTICCIO, an Italian word, now often Englished as " pastiche," formed from pasta, paste, for a composition in music, painting or other arts, made up of selections from fragments or imitations of the work of other artists, a medley or pot-pourri. The term has also been applied to a form of musical composition in which selections from various operas, etc., are pieced together to form a consecutive whole, special librettos being sometimes written for them.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)