Church of San Pietro in Montorio
2 Piazza di S. Pietro in Montorio Roma
Bramante's Tempietto on the Gianicolo with a Via Crucis
Translated to "St. Peter's on the Golden Mountain", an alternative tradition states that St. Peter was crucified at this location instead at present day, Vatican City. In the courtyard, Bramante's Tempietto is an architectural experiment and prototype for larger domes that was designed initially as a tomb.
He designed it in the early 16th Century and is considered an excellent example of High Renaissance art. Take the staircase to the right below the church to artistic reliefs of the 14th Stations of the Cross where you can pray as a pilgrim.