Who coined the term "Gilded Age" to describe post-Civil War America?

Mark Twain

Which band sings the hit "Viva La Vida"? What type of imaginary creature lives under bridges, according to fairy tales? In Mexico, what event reenacts Joseph and Mary's search for lodging? Who ruled Prussia as an enlightened monarch noted for military victories and reforms during the mid-18th century? What is the largest known asteroid in the asteroid belt?