Attar of Nishapur

Abū Ḥamīd bin Abū Bakr Ibrāhīm (1145 – 1221), better known by his pen-name Attar of Nishapur ( Persian: the perfumer of Nishapur ), was a Persian Muslim poet, theoretician of Sufism, and hagiographer from the city of Nishapur who had an immense and lasting influence on Persian poetry and Sufism.

A traveling scholar, Attar studied under many great Sufi Shaykhs and returned to his native Persia to spread his knowledge. Later, Attar fell victim to the seemingly unstoppable spread of the Mongol Empire. In April of 1221, the Mongols entered the Persian city of Nishapur and slaughtered everyone they come across.

Reference

 * Assassin's Creed: Memories