Answer:
While Purgatory was officially defined by the Council of Florence (1439) and officially defended by the Council of Trent in the late sixteenth century, nowhere is Purgatory officially depicted in the Canon of Scripture. As the New Catholic Encyclopedia readily acknowledges, "the doctrine of Purgatory is not explicitly stated in the Bible". Thus, Catholicism is forced to appeal to the traditions of the fathers rather than the testimony of the Father; who through His Word has graciously provided salvation by grace alone, through faith alone, on account of Christ alone (Romans 4:2-8; 11:6; Ephesians 2:8-9).