Interior of Dewan Khas and its inscription (Agra Fort) Postmarked & letter dated 1905 Musamman Burj was built by Shah Jahan for his beloved wife Mumtaz Mahal. It is said that at first a small marble palace built by Akbar was situated at this site, which was later demolished by Jehangir to erect new buildings. Shah Jahan in his turn chose this site to erect the multi-storied marble tower inlaid with precious stones for Mumtaz Mahal. It was built between 1631–40 and offers exotic views of the famous Taj Mahal….It is here that Shah Jahan along with his favorite daughter Jahanara Begum had spent his last few years as a captive of his son Aurangzeb. He lay here on his death bed while gazing at the Taj Mahal in Agra.