The Holy Cellar or Cellar of the Occultation is the basement of the house of Imam Hassan Askari (a.s.), which is located in the northwest of the Holy Shrine of the two Askari Imams (a.s.) in Samarra. The sanctity of this place among Shiites is because it was the house of Imam Hadi (a.s.), Imam Hassan Askari (a.s.) and Imam Mahi (a.s.).
The Ahl al-Bayt World Assembly is an international non-governmental organization (INGO) that was established by a group of Shiite elites under the supervision of the great Islamic authority of the Shiites in 1990 to identify, organize, educate and support the followers of Ahl al-Bayt.