Claim: French artist, Joseph Ducreux, was trained by Maurice Quentin de La Tour and painted Marie Antoinette and drew Louis XVI in his final portrait when he traveled to London at the beginning of the French Revolution.
Evidence: Joseph, Baron Ducreux (26 June 1735 – 24 July 1802) was a French noble, portrait painter, pastelist, miniaturist, and engraver, who was a successful portraitist at the court of Louis XVI of France, and resumed his career at the conclusion of the French Revolution. When Ducreux went to Paris in 1760, he trained as the only student of the pastelist Maurice Quentin de La Tour, who specialized in portraiture. At the outbreak of the French Revolution, Ducreux traveled to London. There he drew the last portrait ever made of Louis XVI before the king's execution. In 1769, Ducreux was sent to Vienna in order to paint a miniature of Marie Antoinette (shown left) before she left the city in 1770 and married Louis XVI of France.