"Assassins" is criticized for its lack of historical accuracy, its adoption of “Egyptian colloquialism” as an alternative to classical Arabic. The series deals with the story of the "Assassin sect", which is Islamic, Shiite, and known as "Nizari" It was founded by Al-Hasan bin Al-Sabah (1037-1124 AD), who was born in the city of Qom in Persia (currently Iran) The sect continued to be effective and influential, until the Mongol leader Hulagu overthrew it in 1256 AD.