Darwaza or the Royal Door was reserved for emperor to join the
congregational prayer. It was situated on the eastern side of the mosque
facing Agra and was the main entrance to the mosque. Projecting out in
the form of a half hexagonal porch, it has two kiosks and merlons at the
top. The gateway is adorned with bands of buff sandstone carved in
geometrical designs. It has two arches one on top of the other.
The cusped small entrance arch inside is ornamented with lotus bud and
leads to a hexagonal vestibule. The roof of this vestibule is in the
shape of a segmented-shaped dome crowned by a flat roof. Its upper
storey houses a gallery and it has arched recesses on either side and
cusped arches on its top.