Over the past five decades, Keith Jarrett and his transcendent improvised solo piano concerts and recordings have helped to redefine the piano in contemporary music, incorporating a broad spectrum of musical languages from jazz and classical to folk and ethnic music traditions. In 2015 his legendary 1975 ECM recording The Koln Concert celebrated its 40th anniversary as the best-selling solo piano recording in history. Considering his most recent ECM recording to be a pinnacle of Mr. Jarrett's career, A Multitude of Angels is a 4-CD box set featuring four complete improvised solo concerts recorded in Italy in October 1996 in Modena, Ferrara, Torino, and Genova.