Question: the earliest surviving building in india containing a true dome is
Answer: Built in circa 1287 CE in rubble masonry , the tomb is a building of historical importance in the development of Indo - Islamic architecture , as it was here that first true arch made its appearance in India , and according to many , the first true dome as well , which however has n't survived , making Alai Darwaza built in 1311 CE , in the nearby Qutb complex , the earliest surviving true dome in India .