Simon the Tanner was a 10th-century Coptic saint from Egypt who practiced the craft of tanning. He is most famous for his role in a legendary miracle involving the Mokattam Mountain near Cairo. According to tradition, he assisted Pope Abraham the Syrian in demonstrating the power of faith to the Fatimid Caliph al-Muizz Lideenillah. This event supposedly resulted in the mountain being lifted, leading to the ruler's conversion to Christianity.