One of the most important temples in  the heart of Tirupati is Sri Govindaraja Swami Temple, which was consecrated by Saint Ramanujacharya in 1130 AD. It is built by the Nayakas, the successors to the Vijayanagar empire. The temple has an impressive outer gopuram. The inner most gopuram is the earliest dating from the 14th-15th centuries. The main shrines are dedicated to Vishnu and Krishna.