Karl (Carl) Thomas Mozart (21 September 1784 – 31 October 1858) was the second son, and the elder of the two surviving sons, of Wolfgang and Constanze Mozart. (The other was Franz Xaver Wolfgang Mozart.)
Karl was born in Vienna. His schooling, in Prague, was under Franz Xaver Niemetschek and František Xaver Dušek, and he became a gifted pianist. Before he finished his schooling, however, he left for Livorno in 1797 to begin his apprenticeship with a trading firm. He planned to open a piano store in the following years, but the project failed for lack of funds. He moved to Milan in 1805 and studied music with Bonifazio Asioli, though he gave up his studies in 1810 to become an official in the service of the Viceroy of Naples in Milan. He also frequently attended events related to his father until his death in Milan in 1858. He neither married nor had children.
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