|La Divina Commedia di Dante (Dante and the Divine Comedy), fresco by Domenico di Michelino, in the nave of the Duomo of Florence, Italy|
Purgatory is another one of those places you might end up when your dead. According to Catholic Church Doctrine, Purgatory is sort of a holding area for those souls destined for Heaven who did not in life reach "a sufficient level of holiness." The term dates back to pre-biblical times when it was believed that prayers for the dead "contributed to their afterlife purification." Supposedly, no soul remains in Purgatory forever. But. Half of forever could still be a pretty long time...
Excerpt from Thief of Time by Terry Pratchett
"OH, YES, said Death. ONCE THERE WERE FIVE OF US . FIVE HORSEMEN. BUT YOU KNOW HOW THINGS ARE. THERE'S ALWAYS A ROW. CREATIVE DISAGREEMENTS, ROOMS BEING TRASHED, THAT SORT OF THING. He sighed. AND THINGS SAID THAT PERHAPS SHOULD NOT HAVE BEEN SAID."