Devnimori is situated 2km of south of Shamlaji. In the Bhiloda taluka of Sabarkantha district of Gujarat state. It is located at a distance of 120km from Ahmedabad.The site was excavated for three seasons between 1960 and 1963 by M.S.University. it appears that the construction activity at Devnimori started with a large Chatushala type of Vihara on the bank of the Meshvo river.This Mahavihara, as it was known, was built in 4th century A.D. The structure was single storied with a roof of flat rectangular tiles. It had open courtyard with rooms or cells around it. It measured 36m x 36m. The courtyard was paved with diagonally placed bricks. Each side of the courtyard had eight rooms. The rooms measured 3sq.m. Each room had an entrance that was a meter wide. On the southern side the central cell was different in plan; it had a raised platform, a meter high, with moulded Bands. The floor was paved with flat, rectangular slabs of green schist.
The Mahastupa or Sharira Stupa at Devnimori contained both relics, the holy relic of the Great Teacher and the Gatha of the chain of causation. The tradition of interring such relics was apparently current in the 4th 'century A.D. There were two caskets; the first was an unfinished casket of schist that was filled with ash .and the second casket, also of schist, had a circular lid and a cylindrical body.This second casket contained a copper cylindrical box with gold and silver foil. Inside the copper .box were silk bags and a gold bottle with a sagger base, cylindrical body and narrow neck with as crew type lid. It is similar to the ;casket found-as Gaz Dheri in North -West Frontier Province of Pakistan. Both caskets were' placed/in ceramic 'pots. From the inscription on the casket, it is known that the contents were in fact the holy relics of Buddha. The Brahmi inscription on the casket mentions that the Mahastupa was built in the year 127 of the reckoning of the Kathika rulers during the reign of king Rudrasena.
The Stupa was built of brick and mud mortar. The exterior required repeated repairs, being open to the elements. Several attempts at repair and renovation were evident, although the later attempts show signs of haphazardness. The problem of recurrent flooding appears to have been addressed as is seen from the construction of platforms and protective walls. Sompura thinks that the Stupa was a gigantic structure of mud masonry and burnt bricks. The upper drum or the elongated hemispherical dome (anda) was damaged and the umbrella (chatrayasti) was missing. The height of the ruined structure was l lm from the ground. The foundation was not deep but the base was broad (25.8 m x 25.8m and height 2Am.). The first tier was the square platform and might have been the circumambulatory path (pradakshinapatha). This platform was architecturally elevational and could be divided into four mouldings. The lowest portion was a tiny moulded cornice made by rounded bricks seen as a string-course a little above ground level. An apsidal Chaitya, a large brick platform, a hall and four small votive Stupas were also constructed in this area. Mehta and Chowdhury suggest that these votive Stupas could be Kulas, referred to by I-tsing. Kulas are described as small Stupas without cupolas on top and which contain relics of a dead person. The votive Stupas at Devnimori did not contain any relics but may have served as memorials for well-known or prominent monks (Mehta and Chowdhury 1966: 180). Amphorae, Painted Ware, Stamped Ware, Red Polished Ware were the main types of pottery found from the excavations.