Butkara, Swat 2nd cent AD

The Butkara Stupa is one of the most important Buddhist shrines of Swat . It may have been originally built by the Mauryan emperor Ashoka, but it is now dated slightly later to the 2nd century BC. The stupa was enlarged on five occasions during the following centuries, every time by building over, and encapsulating, the previous structure. http://rolfgross.dreamhosters.com/India-ArchitectureWeb/Ghandara.htm