The Baku Ateshgah (from Persian: آتشگاه‎, Atashgāh, Azerbaijani: Atəşgah), often called the "Fire Temple of Baku" is a castle-like religious temple in Surakhani town, a suburb in Baku, Azerbaijan. Based on Persian inscriptions, the temple was used as a Hindu, Sikh, and Zoroastrian place of worship. "Atash" (آتش) is the Persian word for fire. The pentagonal complex, which has a courtyard surrounded by cells for monks and a tetrapillar-altar in the middle, was built during the 17th and 18th centuries. It was abandoned in the late 19th century, probably due to the dwindling of the Indian population in the area. The natural eternal flame went out in 1969, after nearly a century of exploitation of petroleum and gas in the area, but is now lit by gas piped from the nearby city.