A little history/geography quiz

[killersheep]

Ok while we're waiting for the answer of the other question, here's another one.

How old was Mary Stuart when she became queen of Scotland?

I'll bet Scrap knows this, probably he even remembers the crowning.

I gotta head out to class, (yep back to school at 32 years young) I'll PM you the correct answer since you already guessed.