Mehrauli was the "second city of Delhi". Qutubuddin Aibak established this city when he became ruler of Delhi. It is worth mentioning here that Prithviraj Chauhan was defeated and killed in battle by Mohammed Ghori in 1192 and left his slave Qutubuddin Aibak as his viceroy in India. However, Delhi was still in the thands of the Cahuhans. In 1193, Qutubuddin Aibak captured it. After the death of Mohammed Ghori in 1206, Qutubuddin enthroned himself as the first sultan of Delhi. Thus, Delhi became the capital of Mamluk or Mammaluke (white slave) and the Slave dynasty began to rule. It was the first dynasty of Muslim sultans to rule over northern India. Qutubuddin set about to create Mehrauli, by destroying Hindu temples and building Islamic structures in their place. One of these was the tower of victory - the 72.5 m tall Qutab Minar, finally completed in 1220 AD. Around Qutab Minar are several ruins from the 11th and 12th centuries ncluding the mausoleum of Saint Qutubuddin Bakhtiyar Kaki, Shamsi Talab, a mosque and tombs of rulers. Qutubuddin's heirs reigned until 1290. Razia Sultan, his grand daughter who ruled for a mere three years, became a historic figure as the first woman empress of India.