States People Centers Other Al-Qāhir ibn al-Muhtadī bi-Quwwat Allāh (Arabic: القاهر بن المهتدي بقوة الله) or Ḥasan al-Qāhir was the 22nd Imam of the Shia Nizari Ismailis.
He is believed to have lived in occultation in the Nizari Ismaili state centrered around Alamut Castle.
[1] There is not a great deal known about al-Qahir except that which is recorded traditional doctrine of the Nizari Isma'ili; he was the father of their 23rd Imam, Hasan 'Ala Zikrihi's-Salam,[2] and according to tradition, revealed himself to his followers in 1164 as the son of "Muhammad al-Muhtadi".
According to him, Hasan II was actually a biological son of Muhammad ibn Buzurg-Umid, and therefore a false imam.
He and his followers had constructed his descent from Nizar († 1095) in order to preserve the right to exist for their branch of Isma'ilism.