The most believed is that he had rheumatic fever. This means that he got a high blood temperature. His doctors thought if they drained his blood, (as was the custom in those times) he might survive. He got weaker and weaker until he sadly died.
Others believe that since his last composition was a funeral dirge, the patron's messenger checked up on the song every week wore a mask. It is thought that while they were having tea the messenger poisoned Mozart so that they would receive his composition and claim that they wrote it, and rob him.
Also, they have evidence that another composer may have murdered him. The other composer was jelous that Mozart had it all, so he hated him. And so they have letters and old documents saying the other composer wished Mozart was dead.
So that would be another therie. But to be honest, they don't know how he died.
Read more: How_did_Mozart_die
Johann Chrysostom Wolfgang Amadeus Mozart died on 5 December 1791
Wolfgang Amadeus Mozart was born in 1756 and died in 1791.
Mozart died in Vienna, Austria.
Leopold Mozart died on May 28, 1787 at the age of 67.
Mozart died while watching the movie 'Amadeus'.
Mozart's Dad Died When He Was At Least 73 Or 72
Johann Chrysostom Wolfgang Amadeus Mozart died on 5 December 1791
Mozart died in 1791 at the age of 35
Wolfgang Amadeus Mozart was born in 1756 and died in 1791.
Mozart married Constanze
Mozart died in Vienna, Austria.
Anna Mozart died on July 3, 1778 at the age of 58.
Mozart died in his 30s in Vienna
Mozart Cintra died in 1977, in Brazil.
Leopold Mozart died on May 28, 1787 at the age of 67.
Mozart died in 1791, so Haydn would have been 59 at the time.
Mozart was born in salzburg and died 1791 in salzburg