The fort was originally built by Emperor Akbar and was later expanded by
Aurangzeb. The fort's huge double walls rise over 20m (65ft) in height and
measure 2.5km in circumference. They are enclosed by a fetid moat and
contain a maze of superb halls, mosques, chambers and gardens which form a
small city within a city.
History

Shahjahan was kept captive by Aurangzeb in this red fort.He did gave his
father a room with a view of the Taj Mahal, built by him. It is an
interesting fort and worth seeing.
Architecture

The foundation of this magnificent mansion was laid by the Emperor Akbar
.The high red sandstone has a stronghold of this great monument spans over
2.5 kilometers of the area. The huge walls of the curved citadel are
interrupted by impressive gates . Presently only the Amar Singh gate is open
to the public. The original and grandest entrance was through the Delhi
Gate, which leads to the inner portal called the Hathi Pol or Elephant Gate.
» Jehangiri Mahal : This is the first building while entering
through the Amar Singh Gate .The Jehangir's palace was built by Akbar as a
residence for his son Jehangir, and is situated north of the gate at the end
of a spacious lawn.
» Khas Mahal : Built in 1637 by Shah Jahan, the Khas Mahal or
the Private Palace is in pure marble and flaunt a distinctive
Islamic-Persian appearance
» Musamman Burj : An octagonal tower with an open pavilion
build by Shahjahan for his beloved wife Mumtaz Mahal.