Johannes Tinctoris
Born: c. 1435, Braine l'Alleud, Belgium
Died: 1511, Belgium
Nationality: Franco-Flemish
Jehan le Taintenier or Jean Teinturier, Latinised in Johannes Tinctoris (aka Jean de Vaerwere) was a Renaissance composer and music theorist from the Low Countries. Up to his time, he is perhaps the most significant European writer on music since Guido of Arezzo.
Read more at https://en.wikipedia.org/wiki/Johannes_Tinctoris