Question: What is different about the Robert Lehman collection compared to other departments at the Met?
About the article "Metropolitan Museum of Art", section "Robert Lehman Collection".

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On the passing of banker Robert Lehman in 1969, his Foundation donated 2,600 works of art to the museum.
Housed in the "Robert Lehman Wing," the museum refers to the collection as "one of the most extraordinary private art collections ever assembled in the United States".
To emphasize the personal nature of the Robert Lehman Collection, the Met housed the collection in a special set of galleries which evoked the interior of Lehman's richly decorated townhouse; this intentional separation of the Collection as a "museum within the museum" met with mixed criticism and approval at the time, though the acquisition of the collection was seen as a coup for the Met.
Unlike other departments at the Met, the Robert Lehman collection does not concentrate on a specific style or period of art; rather, it reflects Lehman's personal interests.
Lehman the collector concentrated heavily on paintings of the Italian Renaissance, particularly the Sienese school.
Paintings in the collection include masterpieces by Botticelli and Domenico Veneziano, as well as works by a significant number of Spanish painters, El Greco and Goya among them.
Lehman's collection of drawings by the Old Masters, featuring works by Rembrandt and Dürer, is particularly valuable for its breadth and quality.
Princeton University Press has documented the massive collection in a multi-volume book series published as "The Robert Lehman Collection Catalogues".
Very famous collections that are now dispersed include the Borghese Collection and Farnese collection in Rome, and the Orleans Collection in Paris, mostly sold in London.
When this happens, it can be a large loss to those interested in art as the initial vision of the collector is lost.
The Princely Family of Liechtenstein have works by such artists as Hals, Raphael, Rembrandt and Van Dyck, a collection containing some 1,600 works of art, but were unable to show them since 1945 when they were smuggled out of Nazi Germany.
The works were finally displayed in the Liechtenstein Museum after nearly 60 years with most in storage.
The important collection of the Thyssen family, mostly kept in the Thyssen-Bornemisza Museum, which settled in Madrid in 1992, was bought to the Spanish state.
Only an exhibited part, the collection of Carmen Cervera, widow of the late Baron Thyssen, remains private but exhibited separately in the museum.
Many collections were left to the public in some form, and are now museums, or the nucleus of a museum's collection.
Most museums are formed around one or more formerly private collection acquired as a whole.
Major examples where few or no additions have been made include the Wallace Collection and Sir John Soane's Museum in London, the Frick Collection and Morgan Library in New York, The Phillips Collection in Washington DC, and the Museu Calouste Gulbenkian in Lisbon Portugal.
Other collections remain complete but are merged into larger collections in museums.
Some important 19th/20th examples are: The Waddesdon Bequest of Renaissance objects was bequeathed to the British Museum, where it is displayed in its own room (a condition of the bequest), as is the Percival David Collection of Chinese porcelain.
Many other bequests or purchased collections are split up within the museum's collection.
Sergei Shchukin, was an important Russian art collector, mainly of French Impressionist and Post-Impressionist art.
His collection is now divided between the Pushkin Museum of Fine Arts in Moscow and the State Hermitage Museum in St. Petersburg.
The Charles Lang Freer Collection became an important part of The Smithsonian—the Freer Gallery of Art.
When the banker Robert Lehman died in 1969, his foundation donated 2,600 works of art to the Metropolitan Museum of Art in New York.
Housed in the "Robert Lehman Wing," the museum refers to the collection as "one of the most extraordinary private art collections ever assembled in the United States".
To emphasize the personal nature of the Robert Lehman Collection, the Met housed the collection in a special set of galleries which evoked the interior of Lehman's richly decorated townhouse; this intentional separation of the Collection as a "museum within the museum" met with mixed criticism and approval at the time, though the acquisition of the collection was seen as a coup for the Met.
Unlike other departments at the Met, the Robert Lehman collection does not concentrate on a specific style or period of art; rather, it reflects Lehman's personal interests.  
For six decades he built upon an art collection begun by his father in 1911 and devoted a great deal of time and energy as Chairman of the Board of Trustees of the Metropolitan Museum of Art.
The importance of his collection became such that in 1957, nearly three hundred works were used for a solo exhibit at the Louvre Museum's Musée de l'Orangerie in the Tuileries Gardens in Paris.
At that time, his was the only private American collection to be given that honor.
In 1968 he received an honorary Doctor of Humane Letters from Yale University for having "enhanced the civic life, the culture, and the artistic development of our civilization.
"After his death in 1969, the Robert Lehman Foundation donated close to 3,000 works of art to the Metropolitan Museum of Art.
Housed in the Robert Lehman Wing, which opened to the public in 1975, the museum has called it "one of the most extraordinary private art collections ever assembled in the United States".
To this day, his Foundation remains active, operating the Robert Lehman Art Lecture Fund and sponsoring exhibitions in museums, both around the U.S. and worldwide.
Other philanthropic activities include support for PBS television programming.
The Robert Lehman Art Center at Brooks School in North Andover, Massachusetts is named in his honor. 
This collection, unlike the rest of the museum’s collections, is housed at the McGuire Center.
This department is relatively new when compared to the other collections and departments although their research is quite extensive. 
Barnard's Wollman Library is located in Adele Lehman Hall.
Its collection includes over 300,000 volumes which support the undergraduate curriculum.
It also houses an archival collection of official and student publications, photographs, letters and other material that documents Barnard's history from its founding in 1889 to the present day.
Barnard's rare books collections include the Overbury Collection, the personal library of Nobel prize-winning poet Gabriela Mistral, and a small collection of other rare books.
The Overbury Collection consists of 3,300 items, including special and first edition books as well as manuscript materials by and about American women authors.
Alumnae Books is a collection of books donated by Barnard alumnae authors.
Conflicting accounts list either Richard B.
Snow or Philip M. Chu as the architect of Lehman Hall... as well as of the Amherst College library and one of the libraries at Princeton University.
The building opened in 1959.