The artist Marc Chagall's "Peace Window" is dedicated to whom?

Dag Hjalmar Agne Carl Hammarskjöld (1905 – 1961) was a Swedish economist and diplomat who served as the 2nd Secretary-General of the United Nations (UN). Hammarskjöld was the youngest person to have held the post being 47 years old when he was appointed. His second term was cut short when he died in the crash of his DC-6 airplane while en route to cease-fire negotiations during the Congo Crisis on 17 September 1961.

"The 'Peace Window' was a gift from the United Nations (UN) staff members, as well as Marc Chagall himself, presented to the U.N. as a memorial to Dag Hammarskjøld.

The memorial, which is about 15 feet wide and 12 feet high, contains several symbols of peace and love, such as the young child in the centre being kissed by an angelic face which emerges from a mass of flowers. On the left, below and above, motherhood and the people who are struggling for peace are depicted. Musical symbols in the panel evoke thoughts of Beethoven's 9th Symphony, which was a favourite of his. The images from the window are inspired by the Biblical text of Isaiah 9, 1 - 7.

The panel was unveiled by Secretary-General U Thant on 17 September 1964 which was 3 years after his death. Initially placed in the south-eastern section of the lobby of the Secretariat Building, facing the East River, the "Chagall Window" was later moved to the Eastern side of the Public Lobby.