Stupa

The stupa's dome shape descends from pre-Buddhist South Asian burial mounds, earthen tumuli raised over the remains of the dead, a form the earliest Buddhist community adapted to house relics of the Buddha after his death and cremation, distributed according to tradition among several communities that each built a stupa over its share.

The Mauryan emperor Ashoka, who converted to Buddhism in the third century BCE and became its most consequential royal patron, is credited with a vast stupa building program across the Indian subcontinent, opening earlier relic stupas and redistributing their contents into many new ones as part of his effort to spread the faith. From this South Asian base the stupa traveled with Buddhism itself along trade and pilgrimage routes: south to Sri Lanka, where it developed into the large hemispherical dagoba; east along the Silk Road into Central Asia and China, where the dome flattened and multiplied into the tiered pagoda; and into Southeast Asia, where it appears both as a freestanding monument, as at the vast stepped stupa of Borobudur in Java, and as the crowning chedi of a temple compound. Despite this wide geographic range and considerable variation in scale and elaboration, the underlying logic never changed: a stupa marks or contains something sacred and is approached by moving around it rather than into it.

A stupa is not entered but walked around, a devotional practice called pradakshina or circumambulation, performed clockwise so that the worshipper's right side, considered the respectful side, stays turned toward the monument. This act of walking, sometimes repeated many times and sometimes accompanied by prostration at intervals, is understood in Buddhist practice as generating merit, and stupas built at pilgrimage sites are often ringed by a railing and gateways, as at Sanchi, specifically to define and mark this circumambulatory path. In the earliest phase of Buddhist art, before figurative images of the Buddha became acceptable, the stupa itself, along with symbols such as the empty throne, the wheel and the footprint, stood in for the Buddha's presence, making the aniconic stupa the primary object of Buddhist devotion for several centuries.

Relics enshrined inside a stupa range from the traditionally attested bodily remains of the Buddha himself, distributed among early stupas, to relics of later teachers, sacred texts, and consecrated objects placed inside stupas built long after the Buddha's lifetime as a means of extending the same sanctifying logic to new monuments. The practice of walking around a fixed sacred point, rather than facing it from a stationary position, distinguishes stupa worship structurally from the mosque, church or synagogue, none of which are built to be circled.