al-Ma'mun, whose regnal name was al-Ma'mun, was the seventh Abbasid caliph, reigning from 813 to 833 CE. His name, al-Ma'mun, means "the trusted one" in Arabic. He was known for his patronage of scholarship and learning, and his reign is considered a golden age of Islamic culture.
al-Maʾmun True Fan Quiz: 12 Questions to separate the true fans from the rest