The Bettmann Archives (purchased by Bill Gates in late 1990) is one of the most renowned collection of 20th century historical imagery and historical stock photography. Dr. Otto Bettmann virtually invented the image resource business 100 years ago and his legacy, built upon by Corbis, now boast over 11 million images and covers every topic imaginable... From the tragedy of the Hindenberg explosion to the courage of Rosa Parks and from the daring of the Wright Brothers to the electricity of Marilyn Monroe.