1/6 On November 15, 2017, Leonardo's da Vinci's "Salvator Mundi" sold for a world-record $450 million in a Christie's New York auction. File Photo by Dennis Van Tine/UPI | License Photo Nov. 15 (UPI) -- On this date in history: In 1791, Georgetown University, in what is now Washington, D.C., opened as the first Roman Catholic college in the United States. Advertisement In 1864, Union General William Tecumseh Sherman's March to the Sea begins with the burning of Atlanta. File Photo by Library of Congress In 1920, the first assembly of the League of Nations was called to order in...