In the western India, many Buddhist caves dating back to the second century BCE onwards have been excavated. Mainly three architectural types were executed: Apsidal vault-roof chaitya hall (found at Ajanta, Pitalkhora, Bhaja), Apsidal vault-roof pillar-less hall (found at Thana-Nadsur) Flat roofed quadrangular hall with a circular chamber at the back (found at Kondivite) In all the chaitya caves, a stupa at the back is common. In the first century BCE, some modifications were made to the standard plan of the apsidal vault-roof variety where the hall becomes rectangular with a stone screen wall as facade. The biggest rock cur chaitya hall was excavated in Karla, Maharashtra. Viharas are excavated in all the caves. The plan of vihara consists of a veranda, a hall and cells around the walls of the hall. Many of the early vihara caves are carved with interior decorative motifs like chaitya arches and the vedika designs over the cell doors of the cave. A stupa was added in the back of th