Marguerite "Peggy" Guggenheim was an American art collector, bohemian, and socialite. Born to the wealthy New York City Guggenheim family, she was the daughter of Benjamin Guggenheim, who went down with the Titanic in 1912, and the niece of Solomon R. Guggenheim, who established the Solomon R. Guggenheim Foundation. Guggenheim collected art in Europe and America between 1938 and 1946. She exhibited this collection as she built it. In 1949, she settled in Venice, where she lived and exhibited her collection for the rest of her life. The Peggy Guggenheim Collection is a modern art museum on the Grand Canal in Venice, Italy, and is one of the most visited attractions in Venice.

The Guggenheim family is an American-Jewish family known for making their fortune in the mining industry, in the early 20th century, especially in the United States and South America. After World War I, many family members withdrew from the businesses and became involved in philanthropy, especially in the arts, aviation, medicine, and culture.