If any of you follow art world news, you'll know that recently there's been much news about museums having to give items back to "source" countries. In many cases these are items whose provenance (history of ownership) is not clear or not authenticated. (In other words, were the items stolen from the "source" countries?)
I'm reading a new book about this problem: "Loot: The Battle Over the Stolen Treasures of the Ancient World" by Sharon Waxman. If you're interested in knowing more about all the sides of this issue, check out this book.