can you name some of his collections?
National Gallery of Art and the Art Institute of Chicago have collections of his major works.
Roy Lichtenstein
In 1996 the National Gallery of Art in Washington, D.C. became the largest single repository of the artist's work when Lichtenstein donated 154 prints and 2 books. 
what is a golf ball? A 1962 painting by Roy Lichtenstein. what is the theme of the painting? It depicts a single sphere with patterned, variously directional semi-circular grooves. where is the painter from? New York what led him to rise to prominence? His works like  "Look Mickey". was he married? Yes to Isabel Wilson.
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Roy Lichtenstein [SEP] Collections
In 1996 the National Gallery of Art in Washington, D.C. became the largest single repository of the artist's work when Lichtenstein donated 154 prints and 2 books. The Art Institute of Chicago has several important works by Lichtenstein in its permanent collection, including "Brushstroke with Spatter" (1966) and "Mirror No. 3 (Six Panels)" (1971). The personal holdings of Lichtenstein's widow, Dorothy Lichtenstein, and of the Roy Lichtenstein Foundation number in the hundreds. In Europe, the Museum Ludwig in Cologne has one of the most comprehensive Lichtenstein holdings with "Takka Takka" (1962), "Nurse" (1964), "Compositions I" (1964), besides the Frankfurt Museum für Moderne Kunst with "We rose up slowly" (1964) and "Yellow and Green Brushstrokes" (1966).