Final answer:
Mozart died in Vienna and was poor at the time of his death, due to the shifting patronage from the aristocracy to a broader audience which affected his income.
Step-by-step explanation:
Mozart passed away in Vienna on December 5, 1791. At the time of his death, he was financially struggling and considered poor. Mozart's financial difficulties were partly due to the changing social structures of the time, which shifted the patronage of music away from solely the aristocracy to a broader public audience, affecting his income and employment opportunities.