The sanchi stupa survived where as …

The stupa at Amaravati was one of the largest and the most significant among the Buddhist stupas. The stupa at Sanchi survived while Amaravati did not. Ther reasons are:

• It is said that the stupa at Amaravati was discovered sometime earlier than the one at Sanchi.
• Perhaps, the scholars were not aware of the significance of preserving the archaeological remains at the site where they were originally found.
• The Sanchi stupa Was discovered in the year 1818. At that time, three of its four gateways were still standing, the fourth was lying on the spot and the mound was in good condition.

But from the Amaravati, several pieces of sculptures were already used by the British administration in London to decorate the gardens. There was an insignificant little mound and was totally denuded of its former glory.