On a cold winter's day, the teenager who had once been Queen of England met a tragic fate within the walls of her former realm's greatest fortress. Catherine Howard, consort to Henry VIII for 15 brief months before her downfall, was executed at the Tower of London on February 13th 1542. Her title of queen had been removed almost three months earlier as she faced allegations of betraying the king through adultery. And on that grey morning, the final part of her story unfolded.