The builder of the Palazzina Borghese, Cardinal Scipione Borghese built this 'suburban villa' for entertaining, and at the same time amassed one of the world's greatest private collections of sculptures and paintings, much given to the the Louvre at the time of Napoleon. The remains are nonetheless one of Rome's finest patrician collections. This remains a 'hot ticket' in town. Reservations aren't mandatory, but strongly recommended.
Tours start every two hours.
Go to the museum's website and you will find a link to reserve. An English speaker should be available. Price is ITL10,000 plus ITL2,000 for the reservation. You'll be allowed two hours in the galleries. Relatively little is known of the civilization which pre-dates the Roman.