 To his office also belonged the duty of preserving in his oratory a consecrated Host, which had to be renewed weekly and kept in readiness in case of the pope's illness, when it was the privilege of the papal sacristan to administer the last sacraments to the pope.The sacristan had always to accompany the pope when he traveled, and during a conclave it was he who celebrated Mass and administered the sacraments.He lived at the Vatican with a sub-sacristan and three lay brothers of the order (cf.