 But as soon as Iltutmish was free, he came to Nasiri, recited the first line of the "qasida" from his memory, and asked Nasiri to complete his recital.Iltutmish invested in numerous waterworks, mosques, and civil amenities in Delhi.He completed the construction of the Qutb Minar, which had been started by Qutb al-din Aibak.