The Government of the fort of Kohram and of Samana was made over by the Sultan to Kutbu-d din... [who] by the aid of his sword of Yemen and dagger of… - Qutb-ud-din Aibak

Qutb-ud-Din Aybak also is said to have destroyed nearly a thousand temples, and then raised mosques on their foundations. The same author states that he built the Jami Masjid, Delhi, and adorned it with the stones and gold obtained from the temples which had been demolished by elephants, and covered it with inscriptions (from the Quran) containing the divine commands. We have further evidence of this harrowing process having been systematically employed from the inscription extant over the eastern gateway of this same mosque at Delhi, which relates that the materials of 27 idol temples were used in its construction.

When Qutbu'd-Din, the commander-in-chief of Muizzu'd-Din Sam alias Shihabu'd-Din Ghuri, conquered Delhi in AH 587 corresponding to AD 1191 corresponding to 1248 Bikarmi, this idol-house (of Rai Pithora) was converted into a mosque. The idol was taken out of the temple. Some of the images sculptured on walls or doors or pillars were effaced completely, some were defaced. But the structure of the idol-house kept standing as before. Materials from twenty-seven temples, which were worth five crores and forty lakhs of Dilwals, were used in the mosque, and an inscription giving the date of conquest and his own name was installed on the eastern gate…"When Malwah and Ujjain were conquered by Sultan Shamsu'd-Din in AH 631 corresponding to AD 1233, then the idol-house of Mahakal was demolished and its idols as well as the statue of Raja Bikramajit were brought to Delhi, they were strewn in front of the door of the mosque…""In books of history, this mosque has been described as Masjid-i-Adinah and Jama' Masjid Delhi, but Masjid Quwwat al-Islam is mentioned nowhere. It is not known as to when this name was adopted. Obviously, it seems that when this idol-house was captured, and the mosque constructed, it was named Quwwat al-Islam…"

[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.