The Red Fort (usually transcribed into English as Lal Qil'ah or Lal Qila) is a 17th century fort complex constructed by the Mughal emperor, Shah Jahan in the walled city of Old Delhi that served as the residence of the Mughal Emperors. The fort was the palace for Mughal Emperor Shah Jahan's new capital, Shahjahanabad, the seventh city in the Delhi site. He moved his capital here from Agra in a move designed to bring prestige to his reign, and to provide ample opportunity to apply his ambitious building schemes and interests. It served as the capital of the Mughals until 1857, when Mughal emperor Bahadur Shah Zafar was exiled by the British Indian government. The Red Fort continued to be used as a cantonment after Independence. A significant part of the fort remained under the control of the Indian Army until 22 December 2003, when it was handed over to the Archaeological Survey of India for restoration. The Red Fort covers a total area of about 254.67 acres enclosed within 2.4 kilometres of defence walls. The walls are punctuated by turrets and bastions. They vary in height from 18 m on the river side to 33 m on the city side. The fort is shaped like an octagon with the north-south axis longer than the east-west axis. The use of marble, floral decorations, double domes in the buildings inside the fort exemplifies the later phase of Mughal architecture Every year on 15 August, the day India achieved independence from the British, Prime Minister hoists the national flag at the Red Fort. The cancellation depicts Red Fort.