أين ولد عبيد الله بن الحسين المهدي مؤسسَ سلالةِ الفاطميين؟
He was born in Kufa in Iraq (or Sanaa, according to some accounts) and was active in the administration of the Abbasid Caliphate, before he began to associate with Ismaili teachers. At first he proselytised under the guidance of Ibn Hawshab in Yemen and Mecca. 
Kufa