Two addtional links for theologians here:
1) This links is a catolic information side mentioning even Jehovahs witnesses in the beginnin:
http://www.catholic.com/tracts/the-hell-there-is
Overview and important Pope says
In his 1994 book, “Crossing the Threshold of Hope”, Pope John Paul II wrote that too often "preachers, catechists, teachers . . . no longer have the courage to preach the threat of hell" (p. 183).
Concerning the reality of hell, the pope says, "In point of fact, the ancient councils rejected the theory . . . according to which the world would be regenerated after destruction, and every creature would be saved; a theory which abolished hell. . . . [T]he words of Christ are unequivocal. In Matthew’s Gospel he speaks clearly of those who will go to eternal punishment (cf. Matt. 25:46). [But] who will these be? The Church has never made any pronouncement in this regard" (pp. 185–6).]]
This book is in my bookshelf and I find it very interesting. I found it in a church for free.
2) this is a link to the online catolic catechism in the vatican library:
about the classical traditional school theology, the classic dogma about
1) particular judgment
2) heaven'
3) final purification
4) hell
5) last judgment
6) hte hope of a new heaven and a new earth
7) in brief and
8)Amen
http://www.vatican.va/archive/ccc_css/archive/catechism/p123a12.htm