(b) Iltutmish received contlnnation of his robe of honour and title Nasir amir al-muminin(Helper of the Commander of the Faithful)from the 'Abbasid Caliph al-Mustansir in 626 (1229) and remained on the throne fort wenty-six years, This added an element of strength to Iltutmish's authority and gave him a status in the Muslim world .