One who enters the Mosque from the northeast through the vast, about 40 m high, parade portal gets in the courtyard. A monumental dome above square base, around 40 m high, rises on the opposite site of the courtyard. The dome is the largest cupola of the mosque. Nevertheless, the dome cannot be seen from the courtyard, for whole building is covered up from inside by the grandiose pischtak, which framed a monumental, deeply embedded Iwan. The Iwan does not allow getting inside the underlying construction supporting the dome; this can only be done from the sides.