(the tomb of Timur, progenitor of the Mughal dynasty, in  Samarkand   Humayun's Tomb ,  Itmad-Ud-Daulah's Tomb  (sometimes called the Baby Taj), and Shah Jahan's own  Jama Masjid  in  Delhi . While earlier Mughal buildings were primarily constructed of red  sandstone , Shah Jahan promoted the use of white marble inlaid with  semi-precious