In the 1780s while Mozart lived and worked in Vienna, he and his father Leopold wrote in their letters that several " cabals " of Italians led by Salieri were actively putting roadblocks in the way of Mozart's obtaining certain posts or staging his operas.

For example, Mozart wrote in December 1781 to his father that " the only one who counts in Emperor's eyes is Salieri ".

" In July 1783 Mozart wrote to his father of " a trick of Salieri's ", one of several letters in which he accused Salieri of trickery.

" Salieri and his tribe will move heaven and earth to put it down ", Leopold Mozart wrote to his daughter Nannerl.

* Within a few years of Salieri's death in 1825, Alexander Pushkin wrote his " little tragedy " Mozart and Salieri ( 1831 ) as a dramatic study of the sin of envy.

The fifth finger may also have been used on earlier, more lightly strung modern harps: Madame de Genlis, for example, in her Méthode, published in Paris in the early nineteenth century, promotes the use of all five fingers, while Roslyn Rensch suggests that Mlle de Guînes, the harpist for whom Mozart wrote his Concerto for Flute and Harp, might occasionally have used all five fingers when playing the harp.

Two of the most prominent composers of the Classical period ( music ), Joseph Haydn ( 1732 – 1809 ) and Wolfgang Amadeus Mozart ( 1756 – 1791 ), wrote harpsichord music.

Italian libretti remained dominant in the classical period as well, for example in the operas of Mozart, who wrote in Vienna near the century's close.

Mozart, in his Sinfonia Concertante for Violin, Viola and Orchestra in E flat, wrote the viola part in D major and specified that the viola's strings were to be raised in pitch by a semitone: his intention was probably to give the viola a brighter tone so as to avoid it being overpowered by the rest of the ensemble.

Mozart liberated the viola when he wrote his six string quintets, some of which are considered to be among his greatest works.

Mozart also wrote for the viola in his Sinfonia Concertante in which the solo viola and violin are equally important, a set of two duets for violin and viola, and the Kegelstatt Trio for viola, clarinet, and piano.

Mozart even wrote scatological music, a series of canons that he sang with his friends.

Mozart was a versatile composer, and wrote in every major genre, including symphony, opera, the solo concerto, chamber music including string quartet and string quintet, and the piano sonata.

Some of Beethoven's works have direct models in comparable works by Mozart, and he wrote cadenzas ( WoO 58 ) to Mozart's D minor piano concerto K. 466.

Pyotr Ilyich Tchaikovsky wrote his Orchestral Suite No. 4 in G, " Mozartiana " ( 1887 ), as a tribute to Mozart.

Mozart evidently wrote keeping in mind the skills of the singers intended for the premiere, which included both virtuosi and ordinary comic actors, asked to sing for the occasion.

On 26 September Mozart wrote:

Similarly, Mozart wrote of the first Konstanze, Caterina Cavalieri, " I have sacrificed Konstanze's aria a little to the flexible throat of Mlle.

Così fan tutte is one of the three Mozart operas for which Da Ponte wrote the libretto.

Cairns also rejects the " romantic legend " that Mozart always wrote out perfect manuscripts of works already completely composed in his head, citing major and prolonged revisions to several manuscripts ( see: Mozart's compositional method ).

The most important symphonists of the latter part of the 18th century are Joseph Haydn, who wrote at least 108 symphonies over the course of 36 years ( Webster and Feder 2001 ), and Wolfgang Amadeus Mozart, who wrote at least 56 symphonies in 24 years ( Eisen and Sadie 2001 ).

Composers also wrote concert arias, which are not part of any larger work, such as " Ah perfido " by Beethoven, and a number of concert arias by Mozart, such as " Conservati fedele ".

In his musical professionalism and open-minded attitude to existing styles he held the mindset of an 18th century composing performer such as Handel or Mozart, who were anxious to assimilate all national " flavors " of their day into their own compositions, and who always wrote with both first-hand performing experience and a sense of direct social relationship with their audiences.

Their letters suggest that both Mozart and his father, being Austrians who resented the special place that Italian composers had in the courts of the Austrian princes, blamed the Italians in general and Salieri in particular for all of Mozart's difficulties in establishing himself in Vienna.

They were not prepared, however, for a special visit in 1770 from a 14-year-old named Wolfgang Amadeus Mozart, who, on a visit to Rome with his father, heard it but twice and transcribed it faithfully from memory, thus creating the first known unauthorised copy.

* Wolfgang Amadeus Mozart returns to Salzburg after touring Paris and London with his father.

January 12, 1782, Mozart reported to his father: " Clementi plays well, as far as execution with the right hand goes.

Wolfgang Amadeus Mozart said of him, " He is the father, we are the children.

Mozart is best known today as the father and teacher of Wolfgang Amadeus Mozart, and for his violin textbook Versuch einer gründlichen Violinschule.

The assessment of Leopold Mozart as a person and as a father brings forth serious disagreement among scholars.

His father, principal cellist of the orchestra, was praised by Mozart for his playing at the premiere of Idomeneo.

His first piano teacher was his father, Wenzel Czerny, who taught him mainly Bach, Mozart, and Clementi.

* Ramesses, the eponymous protagonist's father in " Thamos, König in Ägypten " (" Thamos, King of Egypt ", or " King Thamos ", in English ), a play by Tobias Philipp, for which Mozart wrote incidental music

Mozart and his father passed through Ludwigsburg in 1763 on their " grand tour " and met the composer.

Vienna has been suggested as a possible place of composition, with others believing the sonatas were written during a visit to Salzburg where Mozart introduced his wife, Constanze, to his father, Leopold.

Years later, in 1778, Mozart visited Gossec during a trip to Paris, and described him in a letter to his father as " a very good friend and a very dry man ".

Thus Volkmann learned to play the organ and the piano with his father, studied violin and cello with Friebel, and by age 12 he was playing the cello part in string quartets by Haydn, Mozart and Beethoven.

Suzuki pointed out that great artists ( such as Mozart ) were surrounded with excellent performances from birth, and that the advent of recording technology made this aspect of their environment possible to achieve for large numbers of " ordinary " people whose parents were not themselves great musicians & music teachers like Mozart's father was.

Charles Sherman speculates that Mozart also studied the younger Haydn's Symphony No. 39 in C major because he " often requested his father Leopold to send him the latest fugue that Haydn had written.

Mysliveček provided his younger friend Wolfgang Amadeus Mozart with significant compositional models in the genres of symphony, Italian serious opera, and violin concerto ; both Wolfgang and his father Leopold Mozart considered him an intimate friend from the time of their first meetings in Bologna in 1770 until he betrayed their trust over the promise of an operatic commission for Wolfgang to be arranged with the management of the Teatro San Carlo in Naples.

In a letter to his father Leopold written from Munich on 11 October 1777, Mozart described his character as " full of fire, spirit and life.

The concern Mozart revealed to his father at this time for Mysliveček's sufferings was very touching.