The Red Fort in Delhi was constructed in the 17th century by the Mughal emperor Shah Jahan as the palace of the Mughal emperors and capital city. It served as the capital until 1857. The fort covers 254 acres within high sandstone walls and features many ornate buildings like the Diwan-i-Aam hall and private royal apartments connected by water channels representing paradise. Important structures include the main Lahore Gate where Independence Day celebrations are held, as well as buildings showcasing the peak of Mughal architecture, art, and ornamentation. The Red Fort was designated a UNESCO World Heritage Site in 2007 and remains an important historic site representing India's Mughal era.