Indeed, but after scanning this article that pulls in all those pieces of indirect evidence I wondered whether some type of structured knowledge database (that encodes the innumerable pieces of historical information that are known, tags them with confidence levels etc.) would not be useful to advance research in such domains.
Something like a large collection of RDF triplets against which you could run a query like "Given this new data point how (more)likely that Alexander the Great's tunic is identified in a royal tomb at Vergina?"