Imam Mansoor was born in 302AH (913AD) in Qairwan.

Imam Qaim succeeded his father to the Throne of Imamat at the age of 42 years, and his Imamate lasted for a period of 12 years in which he conquered Genoa, Sardinia, and Corsica in order to curb piracy at the Mediterranean Sea. He passed away in the city his father had founded, namely Mehdia (formerly known as Mehdavia), at the age of 54 on the 13th of Shawwal 334AH (946AD).

Imam Qaim was born in Salamiya in 280AH (893AD). During the Imamate of his father Imam al-Mehdi, he had been commander-in-chief of the army, and had built a naval fleet to secure the Mediterranean Sea, thereby making it safe for all marine traffic (Aziz, 1974).

Imam Al-Mehdi founded the Fatimid Empire, named after the Holy Prophet's daughter Fatima, in the year 910AD in the city of Qayrawan. During his rule as the first Fatimid Caliph, the dynasty spread as far as Algeria, Tunisia, Libya, Sicily, Italy and Southern Spain.

Imam Muhammed al-Mehdi was born on the 15th of Ramazan, 245AH (October, 859AD).