Wikipedia
Shams-ud-din Iltutmish (reigned: 1211–36) was a ruler of the Delhi Sultanate in India. Although his predecessor Qutb ud Din Aibak established the Mamluk Dynasty of Delhi, Iltutmish is considered the founder of the Delhi Sultanate, because he consolidated its position in India.
Shams-ud-din Iltutmish was the third ruler of the Slave dynasty. He founded the Delhi Sultanate in 1211 and received the Caliph's investiture in his rule. He conquered Multan and Bengal from contesting rulers, and Ranathambhore and Siwalik from their rulers.
He expanded his domain by defeating the Muslim rulers of Ghazni, Multan and Bengal, which had previously annexed some of his territories and threatened his domain. He conquered the latter two territories and made further conquests in the Hindu lands, conquering the fort of Ranathambhore and the lands of Gawalior and the fort of Mandur.
He instituted many changes to the Sultanate, re-organising the monetary system and the nobility as well as the distribution of grounds and fiefs, and erected many buildings, including Mosques, Khanqas (Monasteries), Dargahs (Graves) and a Hauz (reservoir) for pilgrims.
Shams ud-din Iltutmish founded the Delhi Sultanate and much strengthened the power of the slave dynasty and of Islam in the India, although his kindred and heirs were not as politically gifted, with no ruler comparable to him in the area until the time of Ghiyas ud din Balban.