Srivari padalu (feet of Lord Vishnu), tirumala-The Temple is constructed in the Dravidian style of architecture and is believed to have been constructed over a period of time starting from 300 AD. The Garbagriha(Sanctum Sanctorum) is called AnandaNilayam. The preceding deity, Venkateswara, is in a standing posture and faces east in the Garbha griha. The temple is one of the eight Vishnu Swayambhu Kshetras and is listed as 106th and the last earthly Divya Desam.
theencyclopediaofhinduism: “Dattatreya is the divine teacher incarnate who handed over all the tenets of Tripura Rahasya to Parasurama at Mahur, the well-known Shakti center of India. Thereupon, Parasurama composed all the teachings received from Dattatreya in sutra form and formulated the work known as Parsuramakalpasutra.” -The Encyclopedia of Hinduism