The Delhi sultanate was a Muslim kingdom based mostly in Delhi. It ruled large parts of the Indian subcontinent for 320 years (1206–1526) Five dynasties ruled over Delhi Sultanate. They are the mamaluk, khilji, tughlaq, sayyid and the lodi dynasties. The mamluk dynasty was started by Qutbuddin Aibak. He was a slave and thus this dynasty is also called Slave Dynasty. Qutubuddin Aibak also made Qutub minar. His son in law, Iltutmish became the ruler after Qutubuddin aibak. He completed the qutub minar.