Adhai Din Ka Jhonpra is a large and imposing structure in the city of Ajmer in Rajasthan, India. It is one of the oldest mosques in India, and the oldest surviving monument in Ajmer. It was originally a Sanskrit college with a temple of Saraswati within it. It was converted into a mosque by Qutb-udDin-Aibak, on the orders of Muhammad Ghori, in 1192CE.