Who was al-ma'mum?

Answer 1

Al-Ma'mum is also known as Almamon, Al-Maymun and el-Mamoun. All these names refer to Abu Ja'far Abdulla al-Ma'mun ibn Harun, who was a caliph (emperor) between 813 and 833.

Al-Ma'mun was born in 786 AD to the caliph (emperor) of the Abbasid Caliphate, an Islamic empire that covered most of the Middle East, North Africa, and Spain in the 8th century. Al-Ma'mun became the caliph in 813 AD, and ruled for twenty years before he ate some bad dates and died, passing the empire to his brother, al-Amin.

He was known for his ability to speak eloquently, his generosity, and his respect for Islam and justice. Under him, the Abbasid caliphate absorbed areas of Afghanistan, Iran and Turkestan. He is also known for his contributions to astronomy (a crater in the moon is named after him, Almamon in the Moon).