A usually dome-shaped structure (such as a mound) serving as a Buddhist shrine.
The hemispherical or semi circular form of the stupa appears to have derived from pre-Buddhist burial mounds in India. Buddhist commemorative monument usually housing sacred relics associated with the Buddha or other saintly persons. Sacred structures such as stupas or statues have a circumambulation or Pradakshina path around them, because from the earliest times circling the stupa has been an important ritual for receiving their energy.
Sanchi stupa is one of the oldest stone structures in India; the stupa covering was built to shelter the remains of a Buddha. The stupa (a Sanskrit word meaning a heap) originated as a simple semi-circular mound of earth, later called the anda. Above the anda was the harmika (Balcony), that structure represented the abode of the gods. Arising from the harmika was a mast (flagpole) called the yastii(slim), often surmounted by a chhatri or umbrella. Around the mound was a railing (path), the gateways which were richly carved and installed at the four cardinal points. Worshippers entered through the eastern gateway and walked around the mound in a clockwise direction keeping the mound on the right, imitating the sun’s course through the sky.