Weave's graphics helped historian Dr Michael Scott to shed light on the secrets of mysterious tombs recently discovered in one of Rome's famous catacombs. Found by accident following a roof collapse, the tombs contained over 2,000 skeletons piled on top of each other. This was quite unlike any other underground tombs seen in Rome. They are located in an area of the catacombs marked as 'X' in the Vatican's underground mapping system - hence the name The X Tombs.