America's first successful world's fair, the Centennial Exposition, was held in 1876 in which city?

America's first chair of law was established in 1779 at which Virginia college? What kind of facility, America's first, opened in 1652 to make coins for the Massachusetts Bay Colony? America's first public high school opened in 1821 in which New England capital? Which sandwich cookie was introduced a few years before the Oreo, which came along in 1912? Who hosted "America's Funniest Home Videos" from 1990 to 1997? America's National Zoo was just one year old when it became part of which institution in 1890? Which race, held since 1897 when its course was 24.5 miles, is the world's oldest annual marathon? Which silent-film star was known as "America's Sweetheart"?