The Miles Davis Quintet is an American jazz ensemble formed in New York in the mid-1950s, appearing in several distinct line-ups through the 1950s and 1960s and associated primarily with hard bop and post-bop. Across its incarnations the group shifted from hard bop towards modal and post-bop idioms, emphasising sparse, modal harmony, collective interplay and extended improvisation, and contributing to the development of modern jazz in the mid-20th-century American cultural landscape.