The Baku Ateshgah, often called the "Fire Temple of Baku" is a castle-like religious temple in Surakhani, a suburb in Baku, Azerbaijan. Based on Persian and Indian inscriptions, the temple was used as a Hindu and Zoroastrian place of worship. "Atash" 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.