<P> When Henry II died on 10 July 1559 from injuries sustained in a joust , fifteen - year - old Francis and sixteen - year - old Mary became king and queen of France . Two of the Queen 's uncles , the Duke of Guise and the Cardinal of Lorraine , were now dominant in French politics , enjoying an ascendancy called by some historians la tyrannie Guisienne . </P>
<P> When Henry II died on 10 July 1559 from injuries sustained in a joust , fifteen - year - old Francis and sixteen - year - old Mary became king and queen of France . Two of the Queen 's uncles , the Duke of Guise and the Cardinal of Lorraine , were now dominant in French politics , enjoying an ascendancy called by some historians la tyrannie Guisienne . </P>
how old was mary queen of scots when she took the throne
how old was mary queen of scots when she took the throne
sixteen
sixteen