Huygens-Fokker Foundation

The Huygens-Fokker Foundation (Dutch: Stichting Huygens-Fokker) is a "centre for microtonal music" founded on February 15, 1960, housed in the Muziekgebouw aan 't IJ (Amsterdam, Netherlands), and named for Christiaan Huygens and Adriaan Fokker (inventor of 31 equal temperament and creator of the Fokker organ).

The Foundation's library possesses a large archive of correspondence, scores, books, and other publications.

They maintain contact with other organizations dedicated to microtonality including Tonalsoft, the Harry Partch Institute, the Logos Foundation, and individuals such as Kyle Gann.

They published the journal Thirty-One and presented MicroFest Amsterdam 2011.

They house the 31-tone Fokker organ with new MIDI-connections in the BAM Hall.