Andreas de Florentia (also known as Andrea da Firenze, Andrea de' Servi, Andrea degli Organi and Andrea di Giovanni; died 1415) was a Florentine composer and organist of the late medieval era. Along with Francesco Landini and Paolo da Firenze, he was a leading representative of the Italian ars nova style of the Trecento, and was a prolific composer of secular songs, principally ballate. Source : Wikipedia