One of the historical wonders of Sri Lanka is the complex rock fortress, Sigiriya, and the palace built on it by one of our former Kings, Kasyapa, many centuries ago. It is an amazing place to see & tourists flock there to view its beauty, grandeur and craftsmanship. One of the highlights of Sigiriya is the frescoes that are painted on the rock walls. These and the site itself are considered National treasures, with UNESCO listing Sigiriya as a world heritage site. (If ever you come over to Sri Lanka, you need to visit Sigiriya). Many years ago, some of the frescoes were vandalized by an unknown group of people, with, (if I remember correctly), either ink or paint being thrown, to deface them. As a result, many experts had to be brought in (foreign and local), to work at restoring these frescoes back to their original state. Thankfully, they succeeded in most of their painstaking efforts.