Tracked on 1 list across 1 authority.
Grand palace-like hotel near Palazzo Barberini with 161 gilded rooms, Venetian chandeliers, butler service, and bespoke Rome Experience tours.
Description via Condé Nast Traveler.
The St. Regis Rome appears on 1 of the lists Mouga tracks, and written up on 1 more. Here's the full trail, dated and linked to each source.