Peter Max, the artist known for defining the visual aesthetic of the 1960s counterculture with his vibrant, fluorescent artworks, died Monday at the age of 88. Renowned for his psychedelic depictions of stars, sunrays, butterflies, and colorful patterns, Max’s art became a widespread symbol of the flower children and the Age of Aquarius, with his imagery appearing on everything from posters and clothing to buses and cruise ships.

Born Peter Max Finkelstein on October 19, 1937, in Berlin to German-Jewish parents, Max’s family fled Nazi Germany in 1938, settling first in Shanghai before moving to Israel and eventually to the United States. Growing up, Max drew inspiration from Buddhist monastery colors and American comic books, later melding his interests in art and astronomy into his signature kaleidoscopic style.

By the late 1960s, Max had transformed from a traditional commercial artist into a cultural figurehead of the hippie movement. He famously redesigned the set of Johnny Carson’s “Tonight Show” in 1968 and appeared on the cover of Life magazine in 1969 with the headline “Portrait of the Artist as a Very Rich Man.” His colorful posters, including the widely circulated psychedelic “Love” poster, sold by the millions, and his brand extended across dozens of product lines. At the height of his success, Max operated a large studio employing many assistants and managed a five-story office building dedicated to his commercial enterprises.

Despite his popularity with the public, critical reception was divided. Art critics often dismissed his work as overly commercial and lacking deeper meaning, with some arguing that Max’s achievements were more about savvy marketing than artistic innovation. Nevertheless, by 1971, his various ventures had generated approximately $1.5 billion. After a period of relative withdrawal in the 1970s and 1980s, Max reemerged in the art world, eventually becoming an artist favored by political and cultural elites. In 1981, President Ronald Reagan and First Lady Nancy Reagan invited him to the White House, where he painted several portraits of the Statue of Liberty and later participated in its restoration efforts.

Max’s later years were marked by prolific output, frequent public appearances, and ventures into merchandising, including selling millions of dollars’ worth of art on the QVC shopping network. He continued to paint portraits of prominent figures, such as Soviet leader Mikhail Gorbachev and multiple U.S. presidents, and served as official artist for major events including the Super Bowl, the World Series, and the New Orleans Jazz & Heritage Festival.

Personal challenges emerged as Max aged. In 1997, he pleaded guilty to concealing over $1 million in income. More recently, his son and business associates faced legal scrutiny over allegations of financial mismanagement and exploitation during a decline in Max’s health, including accusations of the artist’s diminished capacity and disputes over control of his studio. Following a guardianship arrangement, Max spent his final years under the care of his wife, Mary Max, who died in 2019.

While his work rarely achieved critical acclaim comparable to contemporaries like Andy Warhol or Roy Lichtenstein, Peter Max’s art was unquestionably a commercial and cultural phenomenon. His distinctive, eye-catching style left an indelible mark on American popular culture, making him one of the most successful and recognizable artists of his generation. Reflecting on his career, Max once said his intention was to make the universe “a more beautiful place,” a goal he pursued with his unmistakably colorful vision through decades of artistic and commercial success.