Red fort or lal quila is a historical fort in the city of delhi in INDIA. It was the main residence of the emperors of the mugal dynasty for nearly 200 years. till the year 1857. It is located in the centre of delhi . its walls are made of redsand stone constructed by the fifth mugal emperor shah jahan. Every year on independence day prime minister hoists the INDIAN " TRICOLOUR FLAG" 15 august at the main gate of the fort and deleivers a nationally broadcast speech from its ramparts.