The Archaeological Survey of India website tells us about the historic monument in greater detail:
The Bibi-Ka-Maqbara (19°55’ N; 75°15’ E) is a beautiful mausoleum of Rabia-ul-Daurani alias Dilras Banu Begum, the wife of the Mughal Emperor Aurangazeb (1658-1707 A.D.). This mausoleum is believed to be constructed by Prince Azam Shah in memory of his mother between 1651 and 1661 A.D. 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 marbles, drawn by at least 12 oxen were seen by him during his journey from Surat to Golconda.