Mirza Taghi Khan Amir Kabir, was the young prince Nasser-e-Din’s advisor and constable. With the death of Mohammad Shah in 1848, Mirza Taqi was largely responsible for ensuring the crown prince’s succession to the throne. When Nasser ed-Din succeeded to the throne, Amir Nezam was awarded the position of the prime minister and the title of Amir Kabir, the Great Ruler.