The Camerlengo of the Holy Roman Church is an office of the Papal household that administrates the property and revenues of the Holy See. Formerly, his responsibilities included the fiscal administration of the Patrimony of St. Peter. As regulated in the Apostolic Constitution Pastor Bonus (1988), the Camerlengo is always a Cardinal, though this was not the case prior to the 15th century. His heraldic arms are ornamented with two keys – one gold, one silver – in saltire surmounted by an ombrellino, a canopy or umbrella of alternating red and yellow stripes. These are also the arms of the Holy See during a Papal interregnum.
Until the 11th century, the Archdeacon of the Roman Church was responsible for the administration of the property of the Church (i.e., the Diocese of Rome), but its numerous ancient privileges and rights had come to make it a frequent hindrance to independent action on the part of the Pope; as a result, when the last Archdeacon Hildebrand was elected to the papacy as Gregory VII in 1073, he suppressed the Archdiaconate and the prelate entrusted with the supervision of the Apostolic Camera (Camera Apostolica), i.e., the possessions of the Holy See, became known as the Camerarius ("Chamberlain").
Prior to the 18th century, the Camerlengo enjoyed an income of 10,000 to 12,000 scudi a year out of the Apostolic Camera. He had jurisdiction over all suits involving the Apostolic Camera, and could judge separately or in association with the Clerics of the Apostolic Camera; he was not impeded by Consistory. He has appellate jurisdiction over suits decided by the Masters of the Roads. In a narration of the 18th century, the Camerlengo is the chief officer in the Apostolic Camera, the Financial Council of the Pope. In his office are the Governor of Rome (who is Vice-Chancellor), The Treasurer, the Auditor, the President, the Advocate General, the Fiscal Procurator, the Commissary, and twelve Clerks of the Chamber (one with the special title of Prefect of the Grain Supply, another Prefect of Provisions, another Prefect of Prisons, and another Prefect of Roads). Each Clerk of the Chamber received around 8,000 scudi a year, representing 10% of the business that passes through his office.