There are two distinct forms of timber superstructure of the Prasat. One retains the traditional Sikhara as a finial of the roofs; in this type, for the sake of tradition, the Sikhara which formerly was structural has become a mere decorative part of the building.
The other superstructure has the same form and same ornaments as the Mondop-many superimposed horizontal low storeys and at about one third of the total height of this elaborated roof a vertical element formed by what looks like a conventional Stupa, ending in a very high and thin pinnacle.
The Prasat serves two distinct purposes: one is as Royal throne hall; the other to contain some venerated objects, as does, for example, the Prasat of Wat Phra Kaeo in Bangkok which enshrines the statues of the Kings of the present of the present dynasty.