Akbar had built several buildings and forts, but the most impressive among them is the Agra Fort which was completed in 1571 A.D. Red sand stone was used for the construction and, has many gates named Amar Singh Dwar, Hathi Dwar etc. The Jahangir Mahal, Mariam Mahal etc. are among the places built in Agra Fort. The Agra Fort required 2,000 stone-cutters, 2,000 cement and lime-stone makers and 8,000 labourers.