In one scene, while researching the history of the building, Leah is wearing a shirt with the Tower of London prominently featured on the front. She clicks on a website that says "Boy deaths." The Tower is famous for many things, but among them is that it is the site where two York princes disappeared in the 1400s. The two young princes were never discovered but it has been theorized that they were murdered by their uncle King Richard III to further his political ambitions, which of course is part of the theme of this movie.