The building constructed by Qutubuddin Aibak at Ajmer is called
Adhai Din Ka Jhompara is a mosque in the Ajmer city of Rajasthan, India. It was commissioned by Qutb-ud-Din-Aibak, on orders of Muhammad Ghori, in 1192 CE.It was completed in 1199 CE, and further beautified by Iltutmish of Delhi in 1213 CE. The mosque was constructed on the remains of a Sanskrit college, with materials from destroyed Hindu and Jain temples. It is one of the oldest mosques in India, and the oldest surviving monument in Ajmer.