Renaissance music is European music written during the Renaissance, approximately 1400 - 1600. Defining the beginning of the era is difficult, given the lack of abrupt shifts in musical thinking during the 15th century. The process by which music acquired "Renaissance" characteristics was a gradual one, and musicologists have placed its beginnings from as early as 1300 to as late as the 1470s. In addition, the Italian humanist movement, rediscovering and reinterpreting the aesthetics of ancient Greece and Rome, influenced the development of musical style during the period.