The height of Jetavanarama is said to be 400 feet (120 m). This is considered as the largest stupa in the whole world. This stupa belongs to the Sagalika sect. The compound of the stupa is 8 acres (3 ha). One side of the stupa is 576 feet (176 m) in depth. The 4 flight of steps at the four sides is 28 feet (8.5 m) in depth. The doorpost to the shrine which is situated at the courtyard is 27 feet (8 m) in height. It is a foot (0.3 m) underground. There are some stone inscriptions in the courtyard with the names of donors inscribed. King Mahasen (273-301 AD) built this largest stupa in Ceylon, and possibly the whole world. A part of a sash tied by the Buddha is believed to be enshrined here.
King Mahasen (273-301 AD) built this largest stupa in Ceylon, and possibly the whole Buddhist world. Presently restoration of this stupa has made the glorious past of this stupa more evident. Together with the Abhayagiri Stupa this stupa would have been taller than the third Pyramid of Giza and during its hey day would have definitely been a wonder of the world.