Dharmarajika Stupa, Ruins of Taxila

The Dharmarajika Stupa, also referred to as the Great Stupa of Taxila, is a Buddhist stupa near Taxila, Pakistan. It dates from the 2nd century CE, and was built to house small bone fragments of the Buddha. The stupa, along with the large monastic complex that later developed around it, forms part of the Ruins of Taxila - which were inscribed as a UNESCO World Heritage Site in 1980.
It has been claimed that that Dharmarajika Stupa was built over the remains of an even older stupa that had been built by the Mauryan emperor King Ashoka in the 3rd century BCE, though other archeologists alternatively suggest that this is unlikely. Indo-Greek coins found at the site date from the 2nd century BCE, suggesting earliest possible establishment of a religious monument at the site