The Vatican — St. Peter's Basilica, the Vatican Museums, the Sistine Chapel, the Apostolic Palace — is the single most visited site in Rome and among the most visited complexes in the world. The Vatican Museums alone receive 6-7 million visitors annually, and the consequent queuing can consume hours of a visit if you're not prepared. The hotels closest to the Vatican entrance eliminate the transit variable entirely — rolling out of bed at 7:30am for an 8am museum opening is only possible if you're within walking distance.
The Prati neighborhood — the blocks between the Vatican walls and the Tiber, north of the Castel Sant'Angelo — is the primary Vatican hotel district. It's also one of Rome's most genuinely pleasant neighborhoods: wide tree-lined streets built in the 1880s as a deliberate Baroque contrast to the medieval tangles of the historic center, excellent local restaurants on Via Cola di Rienzo and Via Candia, and a residential character that feels notably more lived-in than the tourist-facing streets of the city center. Prati is where Vatican employees and Swiss Guards shop, where local Romans come for aperitivo, and where the trattorias serve actual Roman cuisine rather than tourist approximations.
The Borgo neighborhood — the blocks immediately around the Vatican walls, between St. Peter's Square and the Castel Sant'Angelo — is even closer to the Vatican entrance, but more tourist-dense and with fewer quality independent restaurants. Hotels here are literally steps from St. Peter's Square but sit in an area that empties at night and fills with souvenir shops and overpriced restaurants during the day.
For visitors making a single Vatican visit, the distance from the historic center or Trastevere is worth accepting for a single night of proximity logistics. For visitors spending multiple days in Rome with the Vatican as one of several major priorities, the Prati neighborhood balances Vatican access with genuine Roman neighborhood living quality.