Mozart

By Wikipédia:

Wolfgang Amadeus Mozart (German: [ˈvɔlfɡaŋ amaˈdeus ˈmoːtsaʁt], English see fn.),^[1] baptismal name Johannes Chrysostomus Wolfgangus Theophilus Mozart^[2] (27 January 1756 – 5 December 1791), was a prolific and influential composer of the Classical era. He composed over 600 works, many acknowledged as pinnacles of symphonic, concertante, chamber, piano, operatic, and choral music. He is among the most enduringly popular of classical composers.
Mozart showed prodigious ability from his earliest childhood in Salzburg. Already competent on keyboard and violin, he composed from the age of five and performed before European royalty. At 17, he was engaged as a court musician in Salzburg, but grew restless and travelled in search of a better position, always composing abundantly. While visiting Vienna in 1781, he was dismissed from his Salzburg position. He chose to stay in the capital, where he achieved fame but little financial security. During his final years in Vienna, he composed many of his best-known symphonies, concertos, and operas, and portions of the Requiem, which was largely unfinished at the time of Mozart's death. The circumstances of his early death have been much mythologized. He was survived by his wife Constanze and two sons.
Mozart learned voraciously from others, and developed a brilliance and maturity of style that encompassed the light and graceful along with the dark and passionate. His influence on subsequent Western art music is profound. Beethoven wrote his own early compositions in the shadow of Mozart, of whom Joseph Haydn wrote that "posterity will not see such a talent again in 100 years."^[

Vivaldi

Wikipedia says about Vivaldi:

Antonio Lucio Vivaldi (4 March 1678 – 28 July 1741), nicknamed il Prete Rosso ("The Red Priest") because of his red hair, was an Italian Baroque composer, priest, and virtuoso violinist, born in Venice. Vivaldi is recognized as one of the greatest Baroque composers, and his influence during his lifetime was widespread over Europe. Vivaldi is known mainly for composing instrumental concertos, especially for the violin, as well as sacred choral works and over 40 operas. His best known work is a series of violin concertos known as The Four Seasons.
Many of his compositions were written for the female music ensemble of the Ospedale della Pietà, a home for abandoned children where Vivaldi worked from 1703 to 1715 and from 1723 to 1740. Vivaldi also had some success with stagings of his operas in Venice, Mantua and Vienna. After meeting the Emperor Charles VI, Vivaldi moved to Vienna hoping for preferment. The Emperor died soon after Vivaldi's arrival, and the composer died a pauper, without a steady source of income.
Though Vivaldi's music was well received during his lifetime, it later declined in popularity until its vigorous revival in the first half of the 20th century. Today, Vivaldi ranks among the most popular and widely recorded Baroque composers.

Video Blog chosen by the "Classical Music":

In 1825, already completely deaf, Beethoven was attending a closed trial of a group that would execute his Quartet in E flat major op. 127. One of the violinists Joseph Böhm, recorded the episode: "The poor man was so deaf he could not hear the heavenly sound of his own compositions." To everyone's amazement, however, Beethoven called the group's attention to the smallest errors of execution. "Her eyes followed the arc, and so he was able to notice the smallest fluctuations in time or rhythm, and correct them in time," noted Bohn.

(Em 1825, já completamente surdo, Beethoven foi assistir a um julgamento a portas fechadas de um grupo que iria executar o seu Quarteto em Mi bemol maior op. 127. Um dos violinistas Joseph Böhm, registrou o episódio: "O pobre homem estava tão surdo que não podia ouvir o som celestial das suas próprias composições." Para surpresa de todos, porém, Beethoven chamou a atenção do grupo para os menores erros de execução. "Seus olhos seguiam o arco, e assim ele foi capaz de notar as menores flutuações no tempo ou no ritmo, e corrigi-los no tempo", observou Bohn.)