Dorothy Lichtenstein, a prominent arts patron and widow of the acclaimed Pop artist Roy Lichtenstein, died on July 4 at her home in Southampton, N.Y. She was 84. Dorothy Lichtenstein had been active in the New York contemporary art scene since the early 1960s. After attending Beaver College she worked at the Paul Bianchini Gallery, organizing exhibitions and projects dealing with emerging Pop art, and with William Copley, editing and publishing portfolios of artists’ works for The Letter Edged in Black Press. She married Roy Lichtenstein in 1968. The French Ministry of Culture and Communication made her an Officier de l’Ordre des Arts et des Lettres in 2001. She was described by friends as a gracious philanthropist who was loath to meddle or micromanage. Instead of seeking to sell the work left in her husband’s estate, she simply gave most of it away. Her donations consisted of paintings and sculptures, piles of sketchbooks, file drawers bulging with correspondence, and even the building in Lower Manhattan in which Mr. Lichtenstein’s last studio was located. She did not want the Roy Lichtenstein Foundation, of which she was co-founder and president, to continue in perpetuity and hope to close the foundation by 2028. At her death the foundation still held some artwork and roughly $40 million in cash. Mr. Lichtenstein died in 1997 at 73. Dorothy Herzka was born on Oct. 26, 1939, and grew up in the Crown Heights section of Brooklyn. She attended Beaver College (now Arcadia University), outside Philadelphia, where she majored in political science and pursued a minor in art history. She married Lichtenstein in 1968, who was then a divorcé and the father of two sons. Ms. Lichtenstein’s survivors include her stepsons David, a composer and musician, and Mitchell, a filmmaker and actor, as well as a nephew and three nieces.