One of the earliest mosques in the Sub-continent, built by Qutb-ud-din; the iron pillar in the foreground is from the Gupta Dynasty Period
The concept of equality in Islam and Muslim traditions reached its climax in the history of South Asia when slaves were raised to the status of Sultan. The Slave Dynasty ruled the Sub-continent for about 84 years. Qutb-ud-din Aibak, Shams-ud-din Iltutmush and Ghiyas-ud-din Balban, the three great Sultans of the era, were themselves sold and purchased during their early lives. The Slave Dynasty was the first Muslim dynasty that ruled India.

Muhammad Ghuri had no son so he raised thousands of slaves like his sons. Ghuri had the habit to buy every talented slave he came across. He would then train them in the way royal children were trained. During Ghuri's regime, slaves occupied all key positions in the government machinery. Three favorite slaves of the Sultan were Qutb-ud-din Aibak, Taj-ud-din Ildiz and Nasir-ud-din Qubachah. He appointed them governors of Delhi, Ghazni and Lahore, respectively. Ghuri never nominated his successor but it was obvious that the successor was to be one of his slaves.

When Ghuri died in 1206, the amirs elected Aibak as the new Sultan. Aibak first shifted his capital from Ghazni to Lahore and then from Lahore to Delhi. Thus he was the first Muslim ruler who ruled South Asia and had his headquarters in the region as well. Aibak could only rule for four years and died in 1210. He was succeeded by his son Aram Shah, who proved to be too incompetent to hold such an important position. The Turk nobles invited Iltutmush, one of the slaves and son-in-law of Aibak, to assume charge of the state affairs. Iltutmush ruled for around 26 years from 1211 to 1236 and was responsible for setting the Sultanate of Delhi on strong footings.

After the death of Iltutmush, a war of succession started between his children. First Rukn-ud-din Firuz sat on the throne for seven months. He was replaced by Razia Sultana. Another son of Iltutmush, Bahram, took over from Razia Sultana in 1239. Next, Masud, son of Rukn-ud-din Firuz, became Sultan from 1242 to 1245. Finally the youngest son of Iltutmush, Nasir-ud-din Mahmud became Sultan in 1245. Though Mahmud ruled India for around 20 years, but throughout his tenure the main power remained in the hands of Balban. On death of Mahmud, Balban directly took over the throne and ruled Delhi. During his rule from 1266 to 1287, Balban consolidated the administrative set up of the empire and completed the work started by Iltutmush.