Bara Imambara, Mausoleum and mosque complex in Lucknow, India.

Bara Imambara is a pale beige stone complex in Lucknow whose long symmetrical facade has five deep arches with dark grilles, a band of small recessed arches, and a roofline of cusped arches topped by domed finials. Inside, a vaulted hall 50 by 16 metres and over 15 metres tall holds Asaf-ud-Daula's tomb, with eight surrounding chambers forming the Bhulbhulaiya labyrinth of 489 doorways.

Nawab Asaf-ud-Daula commissioned the building in 1784 to provide work during a famine. Architects from different regions developed solutions to realize the construction without metal beams.

The name Bara means "big", and an imambara is a hall built by Shia Muslims for Azadari, the mourning commemorations of Imam Husain. The complex was raised in memory of his martyrdom, and the Asfi mosque inside it is closed to non-Muslims. The architect Kifayatullah, winner of the design competition, is buried in the main hall beside his patron Asaf-ud-Daula.

The complex opens most days of the week in early morning and closes in late afternoon. Visitors should allow time to explore the labyrinth, where multiple levels are connected through narrow passages.

The main hall measures roughly 50 meters (164 feet) in length and uses a system of interlocking bricks instead of metal supports. This technique creates an open space that ranks among the largest of its kind.