what instruments did vivaldi wrote concertos for?
Violin
entailment
 Busoni 's performing commitments somewhat stifled his creative capacity during this period ; in 1896 he wrote " I have great success as a pianist , the composer I conceal for the present . " His monumental Piano Concerto ( which , in five movements , lasts over an hour and includes in its last movement an offstage male chorus ) was written between 1901 and 1904 . In 1904 and 1905 Busoni wrote his Turandot Suite as incidental music for Carlo Gozzi 's play Turandot . A major project undertaken at this time was the opera Die Brautwahl , based on a tale by E. T. A. Hoffmann , first performed ( to a lukewarm reception ) in Berlin in 1912 . Busoni also began to produce the solo piano works in which his maturer style was clearly revealed , including the Elegies ( BV 249 , 1907 ) , the suite An die Jugend ( BV 252 , 1909 ) and the first two piano sonatinas ( BV 257 , 1910 and BV 259 , 1912 ) . 

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 On going through his papers , Loriod discovered that , in the last months of his life , he had been composing a concerto for four musicians he felt particularly grateful to , namely herself , the cellist Mstislav Rostropovich , the oboist Heinz Holliger and the flautist Catherine Cantin ( hence the title Concert à quatre ) . Four of the five intended movements were substantially complete ; Yvonne Loriod undertook the orchestration of the second half of the first movement and of the whole of the fourth with advice from George Benjamin . It was premiered by the dedicatees in September 1994 . 

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 On the death of his father in 1909 , Busoni wrote in his memory a Fantasia after J. S. Bach ( BV 253 ) ; and in the following year came his extended fantasy based on Bach , the Fantasia Contrappuntistica . 

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 The work is formally titled Variations on an Original Theme ; the word " Enigma " appears over the first six bars of music , which led to the familiar version of the title . The enigma is that , although there are fourteen variations on the " original theme " , there is another overarching theme , never identified by Elgar , which he said " runs through and over the whole set " but is never heard . Later commentators have observed that although Elgar is today regarded as a characteristically English composer , his orchestral music and this work in particular share much with the Central European tradition typified at the time by the work of Richard Strauss . The Enigma Variations were well received in Germany and Italy , and remain to the present day a worldwide concert staple . 

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 Il ritorno is the first of three full @-@ length works which Monteverdi wrote for the burgeoning Venetian opera industry during the last five years of his life . After its initial successful run in Venice the opera was performed in Bologna before returning to Venice for the 1640 – 41 season . Thereafter , except for a possible performance at the Imperial court in Vienna late in the 17th century , there were no further revivals until the 20th century . The music became known in modern times through the 19th @-@ century discovery of an incomplete manuscript score which in many respects is inconsistent with the surviving versions of the libretto . After its publication in 1922 the score 's authenticity was widely questioned , and performances of the opera remained rare during the next 30 years . By the 1950s the work was generally accepted as Monteverdi 's , and after revivals in Vienna and Glyndebourne in the early 1970s it became increasingly popular . It has since been performed in opera houses all over the world , and has been recorded many times . 
