Ibn-ul-Asir says that Qutbuddin Aibak made “war against the provinces of Hind… He killed many, and returned home with prisoners and booty.” In Banara… - Qutb-ud-din Aibak

Ibn Asir only says that Qutbuddin Aibak made ‘war against the provinces of Hind… He killed many, and returned with prisoners and booty.” In Banaras, according to the same author, “the slaughter of the Hindus was immense, none was spared except women and children,”16 who would have been enslaved as per practice.

The first of these bloody sultans, Kutb-d Din Aibak, was a normal specimen of his kind—fanatical, ferocious and merciless. His gifts, as the Mohammedan historian tells us, “were bestowed by hundreds of thousands, and his slaughters likewise were by hundreds of thousands.” In one victory of this warrior (who had been purchased as a slave), “fifty thousand men came under the collar of slavery, and the plain became black as pitch with Hindus.”

[Qutub-ud-din Aibak] was a typical specimen of the ferocious Central Asian warriors of the time, merciless and fanatical. His valour and profuse liberality to his comrades endeared him to the bloodthirsty historian of his age, who praises him as having been a ' beneficent and victorious monarch. …His gifts were bestowed by hundreds of thousands, and his slaughters likewise were by hundreds of thousands. All the leaders in the Muslim conquest of Hindostan similarly rejoice in committing wholesale massacres of Hindu idolaters, armed or unarmed.

The first thing the Muslim Sultanate of Delhi started on was construction of impressive buildings. The first sultan Qutbuddin Aibak had to establish Muslim power in India and to raise buildings "as quickly as possible, so that no time might be lost in making an impression on their newly-conquered subjects". Architecture was considered as the visual symbol of Muslim political power. It denoted victory with authority. The first two buildings of the early period in Delhi are the Qutb Minar and the congregational mosque named purposefully as the Quwwat-ul-Islam (might of Islam) Masjid. This mosque was commenced by Aibak in 592/1195. It was built with materials and gold obtained by destroying 27 Hindu and Jain temples in Delhi and its neighborhood. A Persian inscription in the mosque testifies to this. The Qutb Minar, planned and commenced by Aibak sometime in or before 1199 and completed by Iltutmish, was also constructed with similar materials, "the sculptured figures on the stones being either defaced or concealed by turning them upside down". A century and a quarter later Ibn Battutah describes the congregational mosque and the Qutb Minar. "About the latter he says that its staircase is so wide that elephants can go up there." About the former his observations are interesting. "Near the eastern gate of the mosque their lie two very big idols of copper connected together by stones. Every one who comes in and goes out of the mosque treads over them. On the site of this mosque was a bud khana, that is an idol house. After the conquest of Delhi it was turned into a mosque."