It is known that there is an infinite number of worlds, simply because there is an infinite amount of space for them to be in. However, not every one of them is inhabited. Therefore, there must be a finite number of inhabited worlds. Any finite number divided by infinity is as near to nothing as makes no odds, so the average population of all the planets in the universe can be said to be zero. From this it follows that the population of the universe is also zero, and that any people you may meet from time to time are merely the product of a deranged imagination.
About "Vestiges of Glory": don't worry. That building is not deteriorating much at the moment as it's being carefully preserved. And it's roughly 2000 years old. Which should make it proud witness, I think.
Thanks for your comments on "Creepy House". I'm glad you enjoyed it. You have some excellent compositions, a very good use of free space, unlutter is alway s good. Cheers
Sky Girl