The Choir of the Chapel Royal at the Tower of London is an English ecclesiastical choir originating in the medieval Chapel Royal of the royal household, historically formed to provide liturgical and ceremonial music for royal chapels and services associated with the Tower. Rooted in the Anglican choral tradition, its repertoire ranges from plainsong and Renaissance polyphony to Anglican service music and contemporary commissions, reflecting an evolution from medieval chant to the structured choral practices used in state and ceremonial occasions.