Panchayatana puja has been attributed to Adi Shankara, the 8th century CE Hindu philosopher. It is a practice that became popular in medieval India. However, archaeological evidence suggests that this practice long predates the birth of Adi Shankara. Many Panchayatana mandalas and temples have been uncovered that are from the Gupta Empire period, and one Panchayatana set from the village of Nand (about 24 kilometers from Ajmer) has been dated to belong to the Kushan Empire era (pre-300 CE). The Kushan period set includes Shiva, Vishnu, Surya, Brahma and one deity whose identity is unclear. According to James Harle, major Hindu temples from 1st millennium CE embed the pancayatana architecture very commonly, from Odisha to Karnataka to Kashmir; and the temples containing fusion deities such as Harihara (half Shiva, half Vishnu) are set in Panchayatana worship style.