Question: Who donated a broad range of material to the Metropolitan Museum of Art including many prints by Albrecht Dürer?
About the article "Metropolitan Museum of Art", section "Drawings and prints".

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Though other departments contain significant numbers of drawings and prints, the Drawings and Prints department specifically concentrates on North American pieces and western European works produced after the Middle Ages.
The first Old Master drawings, comprising 670 sheets, were presented as a single group in 1880 by Cornelius Vanderbilt II and in effect launched the department, though it was not formally constituted as a department until later.
Other early donors to the department include Junius Spencer Morgan II who presented a broad range of material, but mainly dated from the sixteenth century, including 2 woodblocks and many prints by Albrecht Dürer in 1919.
Currently, the Drawings and Prints collection contains more than 17,000 drawings, 1.5 million prints, and twelve thousand illustrated books.
The great masters of European painting, who produced many more sketches and drawings than actual paintings, are extensively represented in the Drawing and Prints collection.
The department's holdings contain major drawings by Michelangelo, Leonardo da Vinci, and Rembrandt, as well as prints and etchings by Van Dyck, Dürer, and Degas among many others.
He was educated at Princeton University, class of 1888, and was a generous benefactor of the Metropolitan Museum of Art in New York and gave many works to the (future) Department of Drawings and Prints from a broad range, dating mainly from the sixteenth century, including 2 woodblocks and many prints by Albrecht Dürer in 1919.
Some of his other graphic works were sold at Anderson Galleries, New York, February 18, 1921.
He also was a generous donor to his alma mater.
He died in 1932 and was buried in Cedar Hill Cemetery. 
Before her death, Isabel de Saisset informed the President and governing board of the University of her wish to donate family real estate and the family art collection for the purpose of constructing a gallery and museum.
Many of her personal items — jewels, silver, and tapestries — were also donated.
Since that time, the museum has expanded its collections to include many objects from the United States and abroad.
"Highlights of the de Saisset’s permanent collection include Renaissance, Baroque, Rococo, and 19th century prints by artists such as Albrecht Dürer, William Hogarth, and Giovanni Battista Piranesi.
Modernist prints in the de Saisset Collection include works by Marc Chagall, Henri Matisse, and Pablo Picasso."
The Museum also houses important collections of contemporary prints and photographs. 
  1494: Albrecht Dürer - illustrations to "Ship of Fools"  c. 1495: Albrecht Dürer - "The Holy Family with the Dragonfly"   c. 1498–1500: Albrecht Dürer - "The Sea Monster"  
Lawrason Riggs was an avid collector of Chinese porcelain and prints.
His print collection, which included prints from the late fifteenth through twentieth centuries, was given to the Baltimore Museum of Art as a permanent loan by two of Riggs's brothers in 1941 and was formally accession by the institution in 1943.
The two most-represented artists in the collection are Albrecht Dürer and Rembrandt, but many printmakers from America, England, Holland, France, China, Japan, and Italy are also represented.
Riggs's criteria for his collection included the notoriety of the artist, quality of the print, and beauty.
Lawrason Riggs tended to purchase his prints through the dealers, among them being: Fitz Ray Carrington, Arthur H. Harlow & Co., Frderic K. Kepel & Co., Anderson Galleries, R. Ederheimer, Scott & Fowles Co., and Rudolf Seckel.
Riggs has a particularly close relationship with art dealer F. Meader, who not only helped Riggs locate works but also assisted in restoring and framing prints.