Arab or Persian musician and writer on the theory of music
1237 CE
to 1275 CE
Safi al-Din al-Urmawi or Safi al-Din Abd al-Mu'min ibn Yusuf ibn al-Fakhir al-Urmawi (born c. 1216 in Urmia or Baghdad, dies in 1294) is a renowned musician and writer on the theory of music.