G.R.Sharma was a Historian from Allahabad University who led the Kausambi excavations which added to original historical research in the country. The ruins of this ancient city were found on the left bank of the river Yamuna, 70 km south-west from Allahabad. Thus commenced excavations of the site by the late Prof. G.R. Sharma of the Allahabad University in 1949 and again in 1951-1956. Following these excavations numerous remains of the ancient city came to light. He is among the historians who brought archeology in the mainstream of studying History.
Professor G.R. Sharma, had ventured to document archaeologically the destruction and burning of several settlements in the Ganges valley during the so-called invasion of the Indo-Greek king Menander (considered to be identical with Milinda of the Buddhist tradition) in the 2nd century BC.
Professor G.R.Sharma had also discovered (in 1967) a prehistoric site near Khajuri on the river Belan, a tributary of the river Tons, in the Meja sub-division of Allahabad district of Uttar Pradesh.