(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