The document summarizes the criteria for winning the Caldecott Medal, which is awarded annually by the American Library Association to the artist of the most distinguished American picture book for children published in the United States. To be eligible, the book must be published in English in the year preceding the award. Only the artist is eligible to receive the award. The award is given based on the excellence of the illustrations in the picture book. The Caldecott Medal was established in 1938 and is named after Randolph Caldecott, a famous 19th century English illustrator of children's books.