That the practice of utilizing the spoils of Hindu temples continued throughout the reign of Sultan Iletmish is proved by the Mosque of Ukha in Bayan… - Iltutmish

…In 631 (1233), Shamsuddin marched to Malwa and conquered the city of Bailsan and its fort and demolished its famous temple. The historians have narrated that its citizens built the temple by digging its foundation and raising its walls one hundred cubits from the ground in 300 years. All the images are fixed with lead. The temple is called Gawajit (?) (Vikramajit) Sultan of Ujjain Nagari. The history of the temple is a proof of what is said about its construction and demolition, that is, eleven hundred years. People of Hind are ignorant of history.

…In the year AH 631, he invaded the country of Mãlwah and conquered the fort of Bhîlsã. He also took the city of Ujjain, and had the temple of Mahãkãl… completely demolished, destroying it from its foundations; and he carried away the effigy of Bikramãjît… and certain other statues which were fashioned in molten brass, and placed them in the ground in front of the Jãmi' Masjid, so that they might he trampled upon by the people.

The Jami Masjid of Badaun, also built by Iletmish is one of the largest mosques in India. Following the traditional courtyard plan, it also utilizes Hindu temple pillars. The entrance arches of the gateways leading into the courtyard of the Mosque presumably recall those in the great Mosques at Delhi and Ajmer…