Located at Hissar in the state of Haryana, the Lat Ki Masjid is a famous place for Muslims. It was build by Feroz Shah Tughluq and stands as a unique illustration of Tughluq architecture. The mosque is a combination of buildings. A L-shaped ablution tank and a `Lat` (Pillar) are attached to form the mosque. It is partly build up of red and buff sandstone and partly of rubbli masonry having thick plaster. There are stone pillars exhibiting floral and geometrical designs. Those have been extricated from destroyed Hindu temples. These support the main arched openings.

There are nine bays on the main prayer hall. These consist of arches supported on pillars. The west wall consists of a carved `qibla` and a `pulpit`. Within the courtyard in the northeast, there is a `Lat` (pillar) after which the mosque is named. A few letters in Mauryan Brahmi appears at the top. In the lower portion some names have been scratched at a latter date.