It was the first Indus site to be discovered and excavated in 1921. The Indus civilization was originally called Harappan civilization after this site. The vast mounds at Harappa were first reported by Masson in 1826 and visited by Cunningham in 1853 and 1873. Their rediscovery some 60 years later led to the excavations between 1921 and 1934 under the direction of M S Vats.

The granaries here are located outside the citadel but immediately next to it in the west. They are a series of brick platforms forming the basis of two rows of six granaries each measuring 50 x 20 feet . These are the nearest buildings to the river and thus could easily be supplied by river transport.