But by the time he read "Howl" over at the Six Gallery, he had already revised it and given it a lot more juice, and everybody who showed up somehow knew that evening that that was an outstanding poem that was going to change things.

NPR: Birth of the Beat Generation: 50 Years of 'Howl'

The permanent collection of this six-floor gallery includes thousands of Warhol's paintings, drawings, films, sculptures, prints and more, plus the artist's archives.

BBC: From Warhol to Wright: An arty trip through Pennsylvania

Six years later, the National Gallery of Art was duly inaugurated by President Franklin Roosevelt.

WSJ: Jan van Eyck | 'The Annunciation' | Old Subject, New Approach | Masterpiece | By Richard Cork