Picture book
In 1938, the American Library Association (ALA) began presenting annually the Caldecott Medal to the most distinguished children's book illustration published in the year. The Caldecott Medal was established as a sister award to the ALA's Newbery Medal, which was awarded to a children's books "for the most distinguished American children's book published the previous year" and presented annually beginning in 1922. During the mid-forties to early fifties, honorees included Marcia Brown, Barbara Cooney, Roger Duvoisin, Berta and Elmer Hader, Robert Lawson, Robert McCloskey, Dr. Seuss, Maurice Sendak, Ingri and Edgar Parin d'Aulaire, Leo Politi, Tasha Tudor, and Leonard Weisgard.
Dag Hammarskjöld Medal
On 22 July 1997, during its 3802nd meeting, the United Nations Security Council unanimously adopted Resolution 1121, in which it established the Dag Hammarskjöld Medal. In the resolution, the Security Council also requested that the UN Secretary-General establish criteria and procedures for the awarding of the medal. The first medals were awarded in October 1998.