The Beyeler Foundation or Fondation Beyeler, with its museum in Riehen , near Basel (Switzerland ), owns and oversees the art collection of Hildy and Ernst Beyeler, which features modern and traditional art. The Beyeler Foundation museum includes a space for special exhibitions staged to complement the permanent collection, which is not on public display. In 2006, approximately 340,000 persons visited the museum. In 2016, the number of visitors was 332,000, and it was the most visited art museum in Switzerland. The museum is properly funded, and it receives annual grants from the cantons of Basel City and Basel County and the commune of Riehen. Major partners of the Foundation are Bayer AG, Novartis and Swiss bank UBS .

Art dealers Ernst Beyeler (16 July 1921 – 25 February 2010) and Hilda Kunz (1922 – 18 July 2008), known as Hildy, created the Beyeler Foundation in 1982 and commissioned Renzo Piano to design a museum to house their private collection.