Doria Pamphilj or Palazzo Colonna?

How Palazzo Colonna actually works
On Saturdays the entrance is Via della Pilotta 17, with last entry at 13:15 after opening at 09:15, no booking needed, and audio guides in nine languages. On Fridays you go in at Piazza SS. Apostoli 66 and the visit is guided: Italian at 09:30, 10:00 and 10:30, English at 09:30 and 10:00, French at 10:30. It is closed to general visits Sunday to Thursday and on both afternoons. Visitors with mobility difficulties should use the Piazza SS. Apostoli entrance on Saturdays.
Against that, this gallery is open Monday, Tuesday and Thursday 09:00 to 19:00 and Friday to Sunday 10:00 to 20:00, shut only on Wednesday and three days of the year. It is the easier of the two to fit into a trip by a wide margin. Hours in full.
What each one is
Both are family collections still in family hands, which in Rome is rarer than it sounds. The Colonna gives you a famous gallery hall and a short, concentrated visit in a narrow window. The Doria Pamphilj gives you four wings arranged to a 1767 manuscript, three Caravaggios, the Velázquez pope with Bernini’s bust beside it, and about 90 minutes of an audio guide narrated by the man who lives upstairs. Neither is a state museum, so neither takes part in the free first-Sunday schemes — why that matters.
If you are in Rome over a weekend, the two fit together neatly: Colonna on Saturday morning when it is open and this gallery on Saturday afternoon, when it runs until 20:00 with last entry at 19:00. That is one short walk and two private palaces in a day.
Which I would choose
If your Rome days include a Friday or Saturday morning and you are the kind of visitor who plans, do both. If you are here midweek, the choice is made for you. And if you only want one great private collection and an easy visit, I would send you here, because you can walk in on a Monday when the rest of official Rome is closed. What to do with the rest of the day is on what is nearby.
The one you can visit on a Monday
A reserved 30-minute entry window at the Doria Pamphilj, 4.7 from 1,910 reviews. Six days a week, door sales as well as reservations, and the owner’s commentary included with admission while the desk has units.
Frequently asked questions
Is Palazzo Colonna only open on Saturday mornings?
No, and this is the most common error about it. It opens on Friday and Saturday mornings, including public holidays. Saturdays run from 09:15 with last entry at 13:15 at Via della Pilotta 17; Fridays are guided visits from Piazza SS. Apostoli 66.
Can I visit both in one day?
On a Friday or a Saturday, yes, and they are a few minutes apart. Colonna in the morning, this gallery in the afternoon — it runs to 20:00 on Friday, Saturday and Sunday with last entry at 19:00. The hours here.
Which has the better collection?
They are not really competing. Colonna is a concentrated visit around a celebrated hall; the Doria Pamphilj is four wings hung to a 1767 inventory with three Caravaggios and the Velázquez pope. What is on the walls here.
Do either of them take the free first Sunday?
Neither. Both are private family collections, and the free-entry schemes cover state and municipal museums only. Colonna is closed on Sundays to general visits in any case.