Abstract: "The research paper is studied about architectural aspects of stupas that were built during the reign of King Narapatisithu along Bagan dynasties. The author would like to study these stupas depending on four factors such as (i) Reflection in the form (ii) Spatial compositions (iii) Structural aspects and (iv) Decorative aspects. The stupas are classified according to their development of Form such as Stupas with bulbous shape, Stupas with octagonal basement, Stupas with rectangular basement, Stupas with circular basement, Stupas with pentagonal basement and Sinhalese type Stupas. Most of the stupas with circular basement, bulbous shape, rectangular basement, pentagonal basement and octagonal basement in the Bagan period were apparently evolved from the hemispherical stupa like Sanchi and Amaravali of India. Among them, Dhammayazika Stupa is surpassing example of the Bagan stupas. It was more required in skill for management, estimating, drawing and construction. According to cosmic metaphor and symbol of the five Buddhas, the geometrically guided layout is the finest expression of the Bagan. There were altogether the stupas that built in Bagan and the Dhammayazika Stupa is the zenith of Myanmar Religious Architecture. The contribution of this study is the architectural and technological achievements of Myanmar Religious Architecture that reached its peak during the reign of King Narapatisithu (1174-1211 A.D). Myanmar had impressed on special features and their own style from the Indian style. They showed entirely the different appearance of the whole structures from the Indian monuments. They may be traced to the Indian origin by signifying the philosophy of the fine arts. This research paper is studied that the architectural typology of Bagan monuments a dopted to conform Myanmar style. Furthermore, the research paper is expressed those stupas during the reign of King Narapatisithu were the most outstanding and famous levels compared with other stupas along Bagan periods.".....Paper delivered at the International Conference on Burma/Myanmar Studies: Burma/Myanmar in Transition: Connectivity, Changes and Challenges: University Academic Service Centre (UNISERV), Chiang Mai University, Thailand, 24-­26 July 2015.