Al-Amin

Abū Mūsā Muḥammad ibn Harun al-Amīn (Arabic: أبو موسى محمد بن هارون الأمين; April 787 – 24/25 September 813), better known by just his laqab of al-Amīn (Arabic: الأمين, lit.'the Trustworthy'), was the sixth Abbasid caliph from 809 to 813.

Al-Amin succeeded his father, Harun al-Rashid, in 809 and ruled until he was deposed and killed in 813, during the civil war by his half-brother, al-Ma'mun.