Opera Romana Pellegrinaggi, the Vatican-related pilgrimage and tour agency, secured the discounts in collaboration with Trenitalia, the Italian passenger railway operator. The deals are good through the rest of 2012 for all non-Italian visitors with a Eurail One Country Italy pass or an Interrail One Country Italy Pass.
In addition to the discounted admission (for example, 6 euros or about $7.50 off the Vatican Museums-Sistine Chapel admission of 26 euros/$32), holders of the train passes can enter the museums through the special entrance reserved for guests with advanced reservations. The line is much shorter than the normal, infamously long and winding, queue.
The discount includes the special Friday night openings of the Vatican Museums in September and October.
Opera Romana Pellegrinaggi, usually referred to as ORP, also is offering Eurail Italy passholders discounts on its buses and tours of the Catacombs of Domitilla and its minibus tour through the Vatican gardens.