Pilgrimages to Rome can involve visits to many sites, both within Vatican City and in Italian territory. A popular stopping point is the Pilate's stairs: these are, according to the Christian tradition, the steps that led up to the praetorium of Pontius Pilate in Jerusalem, which Jesus Christ stood on during his Passion on his way to trial. The stairs were, reputedly, brought to Rome by Helena of Constantinople in the fourth century. For centuries, the "Scala Santa" has attracted Christian pilgrims who wished to honour the Passion of Jesus. Other objects of pilgrimage include several catacombs built in imperial times, in which Christians prayed, buried their dead and performed worship during periods of persecution, and various national churches (among them San Luigi dei francesi and Santa Maria dell'Anima), or churches associated with individual religious orders, such as the Jesuit Churches of Jesus and Sant'Ignazio.