Step 1: Cave 15 and its patrons.Cave 15, the Dashavatara (Ten Avatars of Vishnu) cave at Ellora, was built during the reign of Dantidurga of the Rashtrakuta dynasty.
Step 2: Historical period of the patrons.The Rashtrakuta dynasty ruled parts of India from the 8th to 10th centuries C.E. Dantidurga, who changed the cave from a Buddhist vihara to a Hindu temple, reigned in the mid-8th century (circa 735-756 C.E.). Thus, the carvings are from the 8th century C.E.