Mary Queen Of Scots

Mary Queen Of Scots has the unique distinction of being the youngest Queen on this list, as she was crowned as Queen of Scotland when she was just six days old.  The only surviving child of King James V, Mary spent her life ensuring that she remained in a position of power.

Her past is riddled with alleged deviousness, marrying the man who was suspected in killing her first husband, Henry Stuart. After an uprising in Scotland, she sought the protection of her cousin Queen Elizabeth I. Having previously tried to take the throne from Elizabeth, she was imprisoned, and eventually beheaded.