Vadnagar is located in Mehsana district, Kheralu taluka, between the mouth of the Banas river on the west and the Rupen river to the south. It was first excavated by Subbarao and Mehta in 1955. It was known by many names Nagara, Anartapura, Camatkarapura, Anandapura and Vrddhanagar. The present town is situated at the southern and south-western edge of a large tank called Sarmistha.
In the excavations (2008-2009) carried out by the Gujarat State Department of Archaeology under the direction of Y.S. Rawat, a Buddhist Monastery has been brought to light. On plan it was roughly 14.04sq.m. Two additional chambers were added on the western side at its north western corner. The monastery had an open central court yard around which initially nine cells were constructed. A narrow verandah was added on the northern side. The verandah was attached to an entrance platform from north side having two flights of steps from the east and west. Burnt bricks have been used in construction. The sizes of bricks measured 41/42cm x 25126cm x 6/7cm in length, breadth and thickness respectively. The monastery appears to have been constructed around c. 3rd - 4th century A.D. However, it has been observed that the additions and alterations were made in later times also.· Near the north-east corner of the monastery two small votive. Stupas have been uncovered. On plan, one of them is square while the other is circular. The former was constructed in terraced fashion showing three squares in diminishing order from bottom to top. The top was surmounted with a solid dome of which only base is visible. According to archaeological stratigraphy these votive Stupas were built around 5thCentury A.D. A broken head of Buddha, a votive tablet with footprint impression and six petalled flowers were found along with a stone toilet tray depicting a scene showing Buddha receiving honey from a monkey. Black ware sherds with a high polish and inscribed with Brahmi legends like Devshririshi, Shakasya and Dhamma were also found in the recent excavation.