Jaisalmer Fort in Rajasthan is believed to be one of the very few "living forts" in the world (such as Carcassonne, France), as nearly one fourth of the old city's population still resides within the fort. For the better part of its 800-year history, the fort was the city of Jaisalmer. The first settlements outside the fort walls, to accommodate the growing population of Jaisalmer, are said to have come up in the 17th century.