Pura Batur or Pura Ulun Danu was first established in the 17th-century. The temple was dedicated to the god Vishnu and to the goddess of the lake Dewi Danu. The Lake Batur, the largest lake in Bali, is considered to be of utmost importance in the island of Bali as the primary water source for the agricultural activities in Bali. The word Pura means temple, while the two words ulun (head or source) and danu (lake, referring to Lake Batur) is translated as lake source; and so the temple name literally means Lake Source Temple. The word batur, after the village of Batur where the temple is located, means pure or spiritually clean. The definition of Pura Ulun Danu illustrates the significance of the water for the prosperity of the villagers of Batur and for the entire Bali's Hindu community, especially in watering the island's rice paddy fields.