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Introitus et Exitus Cameræ Apostolicæ (Latin: What Comes In and What Goes Out of the Apostolic Camera) is a six-hundred-and-six-volume financial record of the Apostolic Camera of the Holy See, from 1279 to 1524, located in the Vatican Secret Archives. The volumes span the reigns of thirty-two popes from Pope Nicholas III to Pope Clement VII. The volumes relating to the Avignon Popes (130