Well I have a much stupider example. English Heritage (now Natural England I think) decided they owned the rights to Stonehenge[0] 3-4000 years after the architects demise. It seems they realised their error once it had been splashed across the front pages....
The EU side of the Euro is copyrighted, with a permissions grant that prohibits disparaging use. So nice closeups of Euro coins get removed from Wikicommons (as not freely reusable), and are yet-another-license pain to use in OER education content.
[0]http://www.amateurphotographer.co.uk/latest/photo-news/stone...