Wolfgang Amadeus Mozart was born in the archbishopric of Salzburg, a territory which is now Austria, in winter of 1756. Young Wolfgang excelled at the keyboard as well as the violin, and began composing from a very young age. His father, Leopold Mozart, was an accomplished musician — a composer and a violinist —in his own right. Leopold must have been deeply proud of his immensely talented son, and instructed him in music, later organizing performance tours for Wolfgang and his sister, Nannerl, who was also a talented young musician.
Between 1773 and 1777 Mozart worked in the court at Salzburg, as a concertmaster of the court musicians. He was unhappy in Salzburg, and travelled to other cities, attempting to get a foothold. After spending a while in Paris, Wolfgang returned to Salzburg, where he took another job at the court. Unhappy with his post at the court, Mozart looked for employment elsewhere. His frequent absences travels and absences from the court eventually led to dismissal from his position. This led to a relocation to Vienna, where he began a career as a freelance composer. This was an unusual move! Composers of those times relied on court patronage!
Mozart was successful in Vienna, and made a decent living, and it was in the Vienna period that he wrote some of his most famous and most loved operas.