10 Historically Inaccurate Movies by Jane McGrath http://history.howstuffworks.com/american-history/10-historically-inaccurate-movies6.htm
McGrath criticizes Mel Gibson's "Braveheart" for its historical inaccuracies, but did the filmmakers know what they were doing?
After watching "Braveheart" seventeen years ago, I did some research of my own. Screenwriter Randall Wallace impressed me not with his accurate telling of history but his obvious knowledge of what he was doing in bringing bits and pieces of history together in a collage. For example, Isabella did have an affair with a Welshman (not a Scotsman) who fathered a "prince"; but this was a generation after William Wallace was executed. And Edward II's gay lover was murdered, but not by his already dead father, but rather by members of his court.