Hispanic Heritage: The original Don Quixote on display
20 September 2013 Last updated at 22:23 BST
The US Library of Congress in Washington DC holds the largest collection of Hispanic literature in the world.
Among the treasures in its vaults is the original 1605 copy of Miguel de Cervantes' classic novel Don Quixote, one of the most influential novels ever written.
BBC Mundo's Thomas Sparrow was given a tour of the historic collection.