I know it is likely that Elizabeth I did not entertain the idea of marriage with anybody, but her last courtship if you will, was with this son of Catherine de Medici. I believe he was the only one of her foreign suitors to ever visit England. This was when she was in 40s, at the very end of any hope she could have an heir if she married. Some people assert that she knew this was her last chance for marriage and motherhood, and seemed to consider it.. he was hard to get rid of, but then like to keep him dangling. But, she liked to do that with all of them, didn't she?
Did you think it ever crossed her mind to marry him, seriously?