Check out the display on the Tower of Jewels and Novagems from the 1915 San Francisco Panama-Pacific International Exposition in the foyer of the Special Collections Research Center on the Fourth-Floor, South Wing. This year marks the 100th anniversary of the exposition. In celebration, Don Larson and noted Tower of Jewels and Novagem expert, Jay Stevens, put together a unique exhibit with a handmade backdrop created especially for the case by Stevens.