The Second Mrs. Gioconda By mshark Jul 14, 1490 Salai becomes Da Vinci's apprentice. Fact Period: Jul 14, 1490 to Apr 22, 1500 The second Mrs. Gioconda by E.L. Konigsburg The story of Leonardo Da Vinci and his apprentice, Salai May 3, 1491 Il Moro marries Beatrice D'Este. Fact Jan 1, 1492 Da Vinci begins casting the Iron Horse monument. Fact Jan 1, 1493 Da Vinci paints The Last Supper. Fact Jan 1, 1499 Il Moro names Da Vinci as Chief engineer. Fact Jan 10, 1499 The French invade Milan. Fact Jul 29, 1503 Da Vinci begins work on the second Mrs. Gioconda Fact (Mona Lisa) Period: Jul 29, 1503 to Jul 29, 1516 Da Vinci paints Mona Lisa (La Gioconda) Wikipedia