From the 4th to the 14th century AD, the valley at Mỹ Sơn was a site of religious ceremony for kings of the ruling dynasties of Champa, as well as a burial place for Cham royalty and national heroes. Each king, after taking the throne, celebrated a holy purge ceremony, donated gifts and built temples, which explains why My Son is the only place where Cham art flourished without interruption over a period of ten centuries. Originally, this temple complex featured 70 structures, of which 25 survive.