Muhammad Ghori was killed by one of his slaves. Then comes in Qutb-ud-din- Aibak (1206-1210), the man whom Ghuri once trusted as his Governor of Northern India. Now that Ghuri is no more, Aibak declared himself the Sultan of all that Ghuri once possessed in India. 

Aibak first chose Lahore as his capital, and then shifted to Delhi. And it was thus that the Sultanate of Delhi came into being, along with it was marked the beginning of the era of the Muslim dynasties in India, and the dynasty Aibak established came to be known as the Ghulam (denoting a slave serving in the royal guard which he had been) dynasty. 

Aibak was able to rule only for four years – he died falling from his horse, during a game of polo. But the Ghulams continued till 1290. 

Then came the Khiljis (1290 –1320), the Tuglaqs (1320 – 1413), the Sayyids (1414 – 1451), and the Lodhis ((1451 – 1526). During Alauddin Khilji’s reign the empire extended upto South India. During the rule of these Muslim dynasties, Delhi had been shivering out of fear because of the seemingly unending series of political murders for snatching the power of the Sultanate.