"A palace fortress constructed by Prince Muhammed Azam, third son of Moghul Emperor Aurangzeb, 1678-9. Continued by the next viceroy, Shaista Khan, its building stopped after the death of his daughter, Iran Dukht, whose tomb is one of the monuments on the site, which also includes an audience hall with attached hammam, a mosque, etc."
Source: UNESCO World Heritage Tentative List
Mosque in Lalbagh Fort, Bangladesh. Thanks to Aditis of Bangladesh.