World's Fairs or International Expositions are large-scale exhibitions that highlight technology, agriculture and other innovations of national or cultural significance. The 1964 New York World's Fair was held in Flushing Meadows, New York from April 22, 1964 to October 18, 1964, and then again from April 25, 1965 to October 17, 1965. The theme was "Peace Through understanding." This small collection consists of twelve greetings cards which are illustrated with color drawings (architects' renderings) of various buildings from the fair.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The collection contains miscellaneous material related to du Pont, including a letter, Christmas cards, invitation to meet the Representatives of the Societies of the Cincinnati, and invitation from the Secretary of the Navy to the unveiling of the statue of Samuel Francis du Pont (1803-1865).

Irv Koons (1922-2017) was a graphic artist, designer, and illustrator who became one of the leading consumer package designers of the twentieth century. The Irv Koons memorabilia includes a small sample of holiday greeting cards designed by Koons and sent to clients and friends as well as items from Koons's funeral in 2017.

Pierre Samuel "P.S." du Pont (1870-1954) was an industrialist, entrepreneur, and philanthropist. He was president of E.I. du Pont de Nemours & Co. from 1915 to 1919 and chairman of the board of directors from 1919 to 1940. This small collection consists of four Christmas greetings letters from Pierre S. du Pont to Joseph H. Odell (1871-1929), pastor of the First Presbyterian Church of Troy, New York. Odell was the officiant at Pierre S. du Pont and Alice Belin's (1872-1944) wedding on October 16, 1915.

Wilhelmina du Pont (1906-2000) was the daughter of William K. du Pont (1875-1907) and Ethel Hallock (1876-1951), a fourth generation descendent from E.I. du Pont (1771-1834). The item is a special Christmas calling card created for Wilhelmina du Pont by the Philadelphia artist M. Adine L. Robinson (1885-1982).

World's Fairs or International Expositions are large-scale exhibitions that highlight technology, agriculture and other innovations of national or cultural significance. This small collection consists of nine postcards primarily of buildings and exhibits from World's Fairs.