Chittorgarh Fort  is one of the largest forts in India and probably the grandest in the state of Rajasthan. It is a World Heritage Site. The fort, popularly known as Chittor, was the capital of Mewar and is today situated in Chittorgarh City.
It sprawls majestically over a hill 180 m (590.6 ft) in height spread over an area of 280 ha (691.9 acres) above the plains of the valley drained by the Berach River. The fort precinct with an evocative history is studded with a series of historical palaces, gates, temples and two prominent commemoration towers. These monumental ruins have inspired the imagination of tourists and writers for centuries.
The fort was sacked three times between the 15th and 16th centuries; in 1303 Allauddin Khilji defeated Rana Ratan Singh, in 1535 Bahadur Shah, the Sultan of Gujarat defeated Bikramjeet Singh and in 1567 Emperor Akbar defeated Maharana Udai Singh II who left the fort and founded Udaipur.
In 2013, at the 37th session of the World Heritage Committee held in Phnom Penh, Cambodia, Chittorgarh Fort, along with 5 other forts of Rajasthan, was declared a UNESCO World Heritage Site under the group Hill Forts of Rajasthan.
Source:Wikipedia