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The French-born Girard started as a cabin boy working the Europe-Caribbean trade route, and became a sea captain by the age of 23. Eventually he owned a fleet of trading ships.
He went on to settle in Philadelphia and used his shipping wealth to become a financier, buying banks and lending money to the U.S. government during the war of 1812. While some of his business practices were thought to have been unscrupulous, he left nearly his entire fortune to charity when he died.