The Bibi Ka Maqbara (English: "Tomb of the Lady") is a tomb located in Aurangabad, Maharashtra, India. It was commissioned in 1660 by the Mughal emperor Aurangzeb in the memory of his first and chief wife Dilras Banu Begum (posthumously known as Rabia-ud-Daurani) and is considered to be a symbol of Aurangzeb's 'conjugal fidelity'. It bears a striking resemblance to the Taj Mahal, the mausoleum of Aurangzeb's mother, Mumtaz Mahal. Aurangzeb was not much interested in architecture though he had commissioned the small, but elegant, Pearl Mosque at Delhi. Bibi Ka Maqbara is the largest structure that Aurangzeb has to his credit.The comparison to the Taj Mahal has often obscured its very own considerable charm. Due to the strong resemblance, it is also called the Dakkhani Taj (Taj of the Deccan). Bibi Ka Maqbara is the "principal monument" of Aurangabad and its historic city. An inscription found on the main entrance door mentions that this mausoleum was designed and erected by Ata-ullah, an architect and Hanspat Rai, an engineer respectively. Ata-ullah was the son of Ustad Ahmad Lahauri, the principal designer of the Taj Mahal. Aurangzeb's son, Azam Shah, was in later years put in charge of overseeing the repair-work of the mausoleum by Aurangzeb.
Bibi Ka Maqbara is believed to have been built between 1668 and 1669 C.E. According to the "Tarikh Namah" of Ghulam Mustafa, the cost of construction of the mausoleum was Rs. 668,203-7 (rupees six lakh, sixty-eight thousand, two hundred three and seven annas) – Aurangzeb allocated only Rs. 700,000 for its construction. An inscription found on the main entrance door mentions that this mausoleum was designed and erected by Ata-ullah, an architect and Hanspat Rai, an engineer respectively. The marble for this mausoleum was brought from mines near Jaipur. According to Tavernier, around three hundred carts laden with marble, drawn by at least 12 oxen, were seen by him during his journey from Surat to Golconda. The mausoleum was intended to rival the Taj Mahal, but the decline in architecture and proportions of the structure (both due to the severe budgetary constraints imposed by Aurangzeb) had resulted in a poor copy of the latter.