The Relic Stupa of Vaishali is a stupa (hemispherical structure) located within the archaeological site of Vaishali in the state of Bihar in India. It has been dated to potentially the 5th century BCE and is considered to be the earliest archaeologically known stupa.[1][2]
Since 2010, the stupa has been considered a tentative site under the UNESCO World Heritage Sites list as one of the Silk Road sites in India.[3]