Alamut Castle
Nūr ad-Dīn Muḥammad II was born in Alamut Castle. When he ascended to leadership of Alamūt, he immediately avenged his father's death by executing his father's killer, Hasan ibn Namawar (who apparently could not tolerate the reforms and claims of Hassan Ala Dhikrihi's Salam and wanted to reinstate shari'ah) and the latter's relatives upon succeeding his father at nineteen years old. This act put to rest all of the remaining members of the Buyid dynasty.