<p>Filling today's religious book market are Apocalypse commentaries teaching that the seven seals of Revelation 5-8 describe tragedies that are to take place in the last days. Medieval Europeans, on the other hand, thought very differently about the seven seals. Some used the seven seals for catechetical purposes and associated them with seven major events in the life of Christ or seven gifts of the Holy Spirit. Other medieval writers taught tha...