Piazza Navona still holds the outline of the Stadium of Domitian, built in 86 AD, and the Pamphilj family took its western side after Giovanni Battista Pamphilj became Innocent X in 1644. Francesco Borromini began the Collegio Innocenziano in 1654, a square-based block six floors high running between Via di Santa Maria dell'Anima and Via di Sant'Agnese in Agone, set against the sacristy of the church he took over from the Rainaldi. Innocent X died in 1655 without seeing it done, and the hotel's line that Camillo Pamphilj finished it around 1658 does not survive the record: the Centro Pro Unione, the ecumenical centre that occupies part of the same building, documents that direction of the work alternated between Borromini and Girolamo and Carlo Rainaldi, and that the Collegio was still unfinished in July 1666, when Camillo's will asked his son Giambattista to complete it. It housed the clergy of Sant'Agnese and the sons of Pamphilj employees entering the church rather than the family's own boys, and it held the family library under a vault Francesco Cozza frescoed from 1667 to 1672. That salon is not hotel space: it is the Centro Pro Unione's seat at the same door number. The building later served as a convent, became a hotel in 2016, and is run by Eitch Collection, which has two other Rome addresses.
Twenty-one rooms and suites, and the categories are not variations on a theme. The Classic Room is 16 sqm, original flooring, windows on the cobbles of Via di Santa Maria dell'Anima facing the medieval Torre Millina. The Superior Suite is 24 sqm and keeps original furnishings from the building. The Deluxe Suites run 32 to 40 sqm, and this is where the frescoes actually are, in part: the hotel's own page says each suite is unique and that some display seventeenth-century floral frescoes while others preserve wood panelling or the concealed passages attached to Donna Olimpia Maidalchini. The Deluxe Suite with View, same size band, is sold on original coffered ceilings and the view, not frescoes. The Romantic Suites run 37 to 65 sqm under the attic beams with a Starpool steam room, described in wholly modern terms. The Luxury Suite with View is 82 sqm in a former private chapel and is the one category the hotel states outright keeps its frescoed ceilings, its shower built into the shaft of the old library staircase. Read that against the front of the site, which invites everyone to sleep under the frescoes: on the category pages the Single, Classic, Superior and Romantic rooms have none, and no rate guarantees a frescoed room. Its own booking engine sells most of these in larger bands than the room pages give, so read the size on the rate itself. Borromini's spiral stair is still in use, there is a cloister with a well, and the rooms were refurbished in June 2024.
There is no pool, no spa and no gym. What the hotel has is at the top of the building. Terrazza Borromini, the fourth-floor restaurant, serves Mediterranean cooking in frescoed rooms over the square, with a terrace beside the dome and bell tower of Sant'Agnese, daily noon to 3pm and 7pm to 11pm. Breakfast is cooked to order, included, and served there from 7am to 10.30am, which is what the hotel means by breakfast over Bernini's Fountain of the Four Rivers. La Grande Bellezza, the fifth-floor cocktail bar, runs from midday until late and draws Romans rather than residents. Both take bookings only by telephone or email through their own desk, and charge 30 euros a head for a no-show. Neither holds a Michelin distinction.
The two review corpora split, and it is worth knowing where. Expedia gives 9.4 from 654 reviews, location 9.8; Tripadvisor gives 4.4 from 351, location 4.9, value 4.1, with 24 at the lowest rating. The pattern is consistent: praise for the building, the front desk and the address, then breakfast variety, terrace service and noise. Third-floor rooms sit directly under the breakfast rooms. Expedia classes the hotel four stars, the same band Rome uses to set its 7.50 euro city tax, so read the rate as a four-star rate in a Baroque palace, not a discounted five-star one. Its own engine undercuts the agencies, quoting the entry Classic Double at about 195 euros for a midweek January 2027 night against the 232 it shows alongside. Book it to sleep inside the architecture.
