Badami Chalukya architecture is a style in Hindu temple architecture that evolved in the 5th – 8th centuries CE in the Malaprabha river basin, in the present-day Bagalkot district of Karnataka state of India, under the Chalukya dynasty; later it spread more widely. This style is sometimes called the Vesara style and Chalukya style, a term that also includes the much later Western Chalukya architecture of the 11th and 12th centuries. Early Chalukya architecture, used by George Michell and others, equates to Badami Chalukya. The earliest Badami Chalukya temples date back to around 450 in Aihole when the Badami Chalukyas were vassals of the Kadambas of Banavasi. The Early Chalukya style was perfected in Badami and Pattadakal, both in Karnataka. The unknown architects and artists experimented with different styles, blended the Nagara and Dravidian styles. The style includes two types of monuments: rock cut halls or "cave temples", and "structural" temples, built above ground. Badami cave temples Badami cave temples have rock-cut halls with three basic features: pillared veranda, columned hall and a sanctum cut out deep into rock. Early experiments in rock-cut halls were attempted in Aihole where they built three cave temples, one each in Vedic, Buddhist and Jaina styles. Later they refined their style and cut out four marvellous cave temples at Badami. One noteworthy feature of these cave temples is the running frieze of Ganas in various amusing postures caved in relief on each plinth. The outside verandas of the cave temples are rather plain, but the inner hall contains rich and prolific sculptural symbolism. Art critic Dr. M. Sheshadri wrote of the Chalukya art that they cut rock like Titans but finished like jewellers. Critic Zimmer wrote that the Chalukya cave temples are a fine balance of versatility and restrain. The finest structural temples are located in Pattadakal. Of the ten temples in Pattadakal, six are in Dravidian style and four in Rekhanagara style. The Virupaksha temple in many ways holds resemblance to the Kailasanatha temple in Kanchipuram which came into existence a few years earlier. This is a fully inclusive temple, it has a central structure, nandi pavilion in front and has a walled enclosure that is entered by a gateway. The main sanctum has a Pradakshinapatha and mantapa. The mantapa is pillared and has perforated windows (pierced window screens). The external wall surface is divided by pilasters into well-spaced ornamental niches filled with