The Catholic Dogma of Hell

What is Hell? What is the Teaching of God and His Holy Catholic Church on these matters? What did the Saints, Fathers and Doctors of the Church teach about Hell? Who can be saved? What torments await those that die in Original or Mortal sin? Is there Salvation Outside the Catholic Church? What happens to those that say they profess Catholicism yet die in Mortal sin? Do Popes go to Hell? This and many more things are brought up on this most important subject of the duration and eternity of Hell and how to avoid Hell by turning to God and His true-religion in order to save our souls from Pains and Torments of Hell.