Tragic facts about Mary, the Queen of Scots

Mary the Queen of Scots , (AKA Mary Stuart ) is one of the most history disastrous queen . From the time she became an infant monarchs to a tragic demise , Mary attract attention and she still does. For centuries, novels , telivision shows , ( see the CW's reign for example) and even songs have reviled and romanticized her. So behind all the legend and the mythology surrounding her , what are the most important fact about the Mary Stuart?