The streets immediately on St. Peter's Square have limited luxury inventory — most five-star and high-end boutique properties sit a few minutes further out in Prati, where converted historic buildings offer larger rooms, spa facilities and, on the upper floors of a handful of properties, rooftop views toward the dome.

What "luxury" looks like here

Expect period architecture over glass-tower modernity, personalised concierge service that can arrange skip-the-line tickets or private guides, and a genuinely quiet night's sleep — Prati's side streets are calmer than Rome's historic centre.