Ohh yea my grandma in St. Pete also has 2 doors to her flat. The outside one is metal. Both of them have a couple locks, so there are like 5 locks all together that you have to lock and unlock every time. She also has those really hi-tech keys to them which are supposed to be impossible to make a copy of. Me, I couldn't get inside even if all the locks were unlocked because the door was so hard to move!

Also, a lot of buildings have metal doors with code locks on them, but since they are so old it's really easy to tell which three buttons need to be pushed.