Bada Darwaza(Old Fort)
This western entrance to the fortress was most probably built under Humayun, as it is part of the main fortifications. It is a triple storeyed structure, 20 metres high. On either side of it are bastions which, along with the curtain wall beyond, have arrow/gun slits. Kanguras (merlons) would originally have run along the top of the entire length of the wall, but have now completely disappeared except at the top of one of the bastions. The surface ornamentation of the gate consists of inlay patterns in sandstone and marble, some stone carving and tile work. jharokhas (cantilevered, enclosed openings) and chhatris (pavilions) also serve a decorative purpose.