Peregrinatio ad Petri Sedem

The Peregrinatio ad Petri Sedem, abbreviated P.A.P.S., was a papal institution for assistance to pilgrims to Rome and certain other Catholic sites and events. It was merged into the Administration of the Patrimony of the Apostolic See on 4 July 2016.

Source: Wikipedia — Peregrinatio ad Petri Sedem (CC BY-SA 4.0)