When the Buddha passed away, His relics (or ashes) were distributed to seven kings who built stupas over them for veneration. The emperor Ashoka was later said to have dug them out, and distributed the ashes over a wider area, and built 84,000 stupas. With the stupas in place, to dedicate veneration, disciples then initiated 'stupa pujas'. With the proliferation of Buddhist stupas, stupa pujas evolved into a ritual act. Harmarajika stupa (Taxila) and Butkarha (Swat) stupa at Jamal Garha were among the earliest stupas of Gandhara. These had been erected on the orders of king Ashoka and contained the real relics of the Buddha.

At first, the object of veneration was the stupa itself. In time, this symbol was replaced by a more sensitive human image. The Gandhara schools is probably credited with the first representation of the Buddha in human form, the portrayal of Buddha in his human shape, rather than shown as a symbol.

As Buddhist art developed and spread outside India, the styles developed here were imitated. For example, in China the Gandhara style was imitated in images made of bronze, with a gradual change in the features of these images.

Swat, the land of romance and beauty, is celebrated throughout the world as the holy land of Buddhist learning and piety. Swat acquired fame as a place of Buddhist pilgrimage. Buddhist tradition holds that the Buddha himself came to Swat during his last reincarnation as the Guatama Buddha and preached to the people here. It is said that the Swat was filled with fourteen hundred imposing and beautiful stupas and monasteries, which housed as many as 6,000 gold images of the Buddhist pantheon for worship and education. There are now more than 400 Buddhist sites covering and area of 160 Km in Swat valley only. Among the important Buddhist excavation in swat an important one is Butkarha-I, containing the original relics of the Buddha.