Kerman is the capital city of Kerman Province, Iran. At the 2011 census, its population was 821,374, in 221,389 households, making it the 10th most populous city of Iran. It is the largest and most developed city in Kerman Province and the most important city in the southeast of Iran. It is also one of the largest cities of Iran in terms of area. Kerman is famous for its long history and strong cultural heritage. The city is home to many historic mosques and Zoroastrian fire temples. Kerman is also on the recent list of the world's 1000 cleanest cities. Kerman became capital city of Iranian dynasties several times during its history. It is located on a large, flat plain, 800 km south-east of Tehran, the capital of Iran.