Arhai-Din-Ka-Jhopra, Ajmere. Built in the 13th century by the first Muslim Sultan in India, Qutb-ud-Din Aibak. The site of a religious fair that lasted for 2.5 days and it is therefore also known as the 'Hut of Two-and-a-Half Days'. Another Sultan, Iltutmish, used stones from nearby Jain and Hindu temples to build a screen of seven arches in front of the main hall.