Al-Qa'im bi-Amr Allah, Fatimid caliph (born 893)

Abū al-Qāsim Muḥammad ibn ʿAbd Allāh, better known by his regnal name al-Qāʾim (القائم) or al-Qāʾim bi-Amr Allāh, was the twelfth Isma'ili Imam and second caliph of the Fatimid dynasty, ruling in Ifriqiya from 934 to 946, succeeding his father Abd Allah al-Mahdi Billah.