construction and completion of the third grand Chola architectural marvel, the chariot-shaped Airavatesvara Temple at Dharasuram on the outskirts of modern Kumbakonam. Chola administration and territorial integrity until the rule of Kulothunga Chola III was stable and very prosperous up to 1215, but during his rule itself, the decline of the Chola power started following his defeat by Maravarman Sundara Pandiyan II in 1215–16. Subsequently, the Cholas also lost control of the island of Lanka and were driven out by the revival of Sinhala power. In continuation of the decline, also marked by the resurgence of the Pandyan dynasty as the most powerful rulers in South India, a lack of a controlling central administration in its erstwhile-Pandyan territories prompted a number of claimants to the Pandya throne to cause a civil war in which the Sinhalas and the Cholas were involved by proxy. Details of the Pandyan civil war and the role played by the Cholas and Sinhalas, are present in the Mahavamsa as well as the Pallavarayanpettai Inscriptions. Decline The Cholas, under Rajaraja Chola III and later, his successor Rajendra Chola III, were quite weak and therefore, experienced continuous trouble. One feudatory, the Kadava chieftain Kopperunchinga I, even held Rajaraja Chola III as hostage for sometime. At the close of the 12th century, the growing influence of the Hoysalas replaced the declining Chalukyas as the main player in the Kannada country, but they too faced constant trouble from the Seunas and the Kalachuris, who were occupying Chalukya capital because those empires were their new rivals. So naturally, the Hoysalas found it convenient to have friendly relations with the Cholas from the time of Kulothunga Chola III, who had defeated Hoysala Veera Ballala II, who had subsequent marital relations with the Chola monarch. This continued during the time of Rajaraja Chola III the son and successor of Kulothunga Chola III The Hoysalas played a divisive role in the politics of the Tamil country during this period. They thoroughly exploited the lack of unity among the Tamil kingdoms and alternately supported one Tamil kingdom against the other thereby preventing both the Cholas and Pandyas from rising to their full potential. During the period of Rajaraja III, the Hoysalas sided with the Cholas and defeated the Kadava chieftain Kopperunjinga and the Pandyas and established a presence in the Tamil country. Rajendra Chola III who succeeded Rajaraja III was a much better ruler