Paul Durand-Ruel was a prominent art dealer and collector who played a crucial role in promoting and supporting the Impressionist movement. He had a close friendship with Claude Monet and was instrumental in organizing exhibitions and selling their works.

Albert C. Barnes was an American art collector and philanthropist who founded the Barnes Foundation in Merion, Pennsylvania. The collection umfasst a significant number of works by Impressionist, Post-Impressionist, and Modern artists, including Renoir, Cézanne, Matisse, and Picasso.

Lorenzo de' Medici, also known as Lorenzo the Magnificent, was a prominent figure in the Italian Renaissance. He was a patron of the arts and a collector of paintings, sculptures, and other works of art. His collection formed the basis of the Uffizi Gallery, which is now one of the most renowned art museums in the world.

Catherine the Great was a Russian empress who reigned from 1762 to 1796. She was a passionate art collector and acquired a vast collection of paintings, sculptures, and other works of art. Her collection formed the basis of the Hermitage Museum, which is now one of the largest and most comprehensive art museums in the world.

Henry Clay Frick was an American industrialist and art collector. He amassed a significant collection of European paintings and decorative arts, which he housed in his mansion on Fifth Avenue in New York City. After his death, the Frick Collection was opened to the public and is now one of the most popular art museums in the city.

Henry Tate was a British sugar refiner and art collector. He donated his collection of British art to the nation, which led to the establishment of the Tate Gallery in London. The Tate Gallery has since expanded and now comprises four museums: Tate Britain, Tate Modern, Tate Liverpool, and Tate St. Ives.

Peggy Guggenheim was an American art collector and patron of the arts. She amassed a significant collection of modern and contemporary art, which she housed in her palace in Venice, Italy. After her death, the Peggy Guggenheim Collection was opened to the public and is now one of the most popular art museums in Venice.

Abby Aldrich Rockefeller was an American art collector and philanthropist. She was one of the founders of the Museum of Modern Art (MoMA) in New York City, along with her husband, John D. Rockefeller, Jr. MoMA has since become one of the most influential museums of modern and contemporary art in the world.

Joseph H. Hirshhorn was an American art collector and philanthropist. He donated his collection of modern and contemporary art to the Smithsonian Institution, which led to the establishment of the Hirshhorn Museum and Sculpture Garden in Washington, D.C. The museum houses a significant collection of works by artists such as Picasso, Pollock, and Warhol.

Eli Broad was an American businessman, philanthropist, and art collector. He founded the Broad, a contemporary art museum in Los Angeles, California, along with his wife, Edythe Broad. The museum houses a significant collection of works by artists such as Andy Warhol, Jeff Koons, and Takashi Murakami.

Don and Mera Rubell are American art collectors and philanthropists. They founded the Rubell Museum in Miami, Florida, which houses a significant collection of contemporary art. The museum features works by artists such as Jean-Michel Basquiat, Keith Haring, and Cindy Sherman.

Dasha Zhukova is a Russian art collector and philanthropist. She founded the Garage Museum of Contemporary Art in Moscow, Russia, in 2008. The museum houses a significant collection of contemporary art, including works by artists such as Damien Hirst, Jeff Koons, and Takashi Murakami.

Liu Yiqian is a Chinese art collector and philanthropist. He founded the Yuz Museum in Shanghai, China, in 2014. The museum houses a significant collection of contemporary art, including works by artists such as Ai Weiwei, Zeng Fanzhi, and Zhang Xiaogang.

Bernard Arnault is a French businessman and art collector. He founded the Fondation Louis Vuitton in Paris, France, in 2014. The museum houses a significant collection of modern and contemporary art, including works by artists such as Pablo Picasso, Claude Monet, and Jeff Koons.

Jochen Zeitz is a German art collector and philanthropist. He founded the Zeitz Museum of Contemporary Art Africa (MOCAA) in Cape Town, South Africa, in 2017. The museum houses a significant collection of contemporary art from Africa and the African diaspora, including works by artists such as El Anatsui, Wangechi Mutu, and Yinka Shonibare.