The main hall of the Bara Imambara in Lucknow (India).
In the center is the tomb of Asaf-ud-Daula, Nawab of Lucknow, who built this Imambara.
His grave is not aligned with the monument, possibly because it is oriented toward Mecca (but I am not sure that's the reason for the tomb's orientation. When i was there, I checked with my compass, and it didn't seem to point towards Mecca).
For more info about this monument, read en.wikipedia.org/wiki/Bara_Imambara.
An Imambara is a congregation hall for Shia commemoration ceremonies, especially those associated with the Remembrance of Muharram. Read more here: en.wikipedia.org/wiki/Imambara.