And that the bell tower platform is really only about 3 feet above the ground
A less known one is about the Palace building. Whenever we see it from the outside we see that it's got 2 or 3 floors. But I've got a "behind the scenes" still somewhere that shows that they only built the ground floor. All the upper floors were "filled in" with a matte or a hanging miniature. Even when you know it's hard to see the join.
Although talking of joins. The most recent restoration does give away the secret a bit with that shot of the view below the bell tower that you've included here. The lower part is OK but the join is quite obvious higher up the bell tower. Sometimes a super-sharp restoration isn't always the best solution.
Steve