Answer: The words that need to be capitalized would be "Rome," and if you meant the Sistine Chapel in Rome, then "Sister Chapel" too.
Explanation: Rome is the name of a city, which needs to be capitalized. And if you are talking about a specific chapel (the Sistine Chapel), then that should be capitalized, too. Otherwise, just Rome because just ANY sister chapel would be non-specific and no need for capitalization.
