This is getting ridiculous! You grabbed some names somewhere, and you say you mixed up hotels with museums, but that just shows you don't know anything about the subject. The names of palaces you give, there's a museum, a library, and the Sistine Chapel (!) in there. I have to agree the Sistine Chapel is a huge room, and that it could house many refugees, but I'm not sure it would the most appropriate place for them. I don't think anyone but you has ever suggested to use it as a shelter for refugees.
I am not talking about the chapels and libraries. Don't divert the topic. I was talking about the guesthouses, residence of the arch-priest, palaces, and the Swiss guard barracks.
I'm not diverting the topic, you are. You talked of hotels, the Palace of Saint Charles, the Apostolic Palace. Not me, you did. There are no empty palaces in the Vatican, and we may doubt there is single free room in the Swiss guard barracks, since security has been increased several times those past few years.
You had a choice. You could have made an apology and say you didn't know anything about the Vatican, but you didn't, so you've lost all credibility.
Indeed, there are a lot of Catholic nunneries which have plenty of room. I know of at least one which I visited when I lived in the Bay Area. Come to think of it, every one of the many Catholic monasteries or whatever-the-hell they were had walls and fences all around it and not a lot of riff-raff within the confines. I will admit that one with a nunnery did have some crazy religious lady in the parking lot who told us about the nuns. It was down in or near San Jose IIRC.
Yes, definitely. In Northern Italy, there are some large buildings which are not much used these days, but we must keep in mind those buildings are anything but modern. They all have very high ceilings which make them difficult (or costly) to heat. That wasn't an issue with monks who were used to live without any comfort, but it would be more difficult nowadays. Also, don't expect anything looking like a bathroom close to the bedrooms.