The most important ruling dynasties in south India were the Pallavas and Chalukyas. The realm of the Pallavas spread from the region around their capital, Kanchipuram, to the Kaveri delta. The kingdom of the Chalukyas was centred on the Raichur Doab between the rivers Krishna and Tungabhadra. Aihole was the capital of the Chalukyas. It was an important trading centre as well as a religious centre. The Pallavas and Chalukyas frequently attacked each other’s lands, especially the capital cities, which were prosperous towns.