Non-Catholics, non-Christians and Atheists.
The Vatican in Vatican City, Italy.
Pets are not allowed in the Vatican but stray cats occasionally find there way into Vatican City from Rome. Even the pope is not allowed to have a pet.
European
An encyclopedia or an atlas would give you the answer.
There are no hotels for tourists in the Vatican. Your best place to find pictures would be to do an Internet search of hotels in Rome.
The type of book is callled an almanac. You can find it in your local library
There is only one city actually in Rome and that is Vatican City.
The opposite word of significant using prefixes would be "insignificant."
I am sure you will find numerous copies of the Bible in the Vatican.
From a slight green color in the potato from which the chip was made. Such an insignificant amount would not be toxic.
Your best bet is to do an image search on the Internet for the Vatican.
The Kremlin is found in Moscow, Russia. The houses of Parliament are found in London, England. The Vatican is found in Vatican City, or in Rome, Italy. The White House is found in Washington, DC in the US.