Mysteries is an album by Keith Jarrett released in 1975 on ECM Records. It was recorded in December of that year at Tonstudio Bauer in Ludwigsburg, Germany. The album features Jarrett on piano, soprano and tenor saxophone, alongside Dewey Redman, Charlie Haden, and Paul Motian.
The record is part of Jarrett's American Quartet series, exploring avant-garde jazz with influences from free jazz and classical music. Mysteries stands out for its introspective atmosphere and the interaction among musicians, with original compositions by Jarrett blending improvisation and structure.
Critical reception was positive, highlighting the group's cohesion and the emotional depth of the pieces. Mysteries is considered an essential work in Jarrett's discography, showcasing his versatility as a performer and composer in an experimental jazz context.