The Church Fathers · 688
Foreknowledge of the Future Age
Prognosticon Futuri Saeculi
Julian of Toledo · c. 642–690
What it is
Three books on death, on the state of souls before the resurrection, and on the world to come, assembled from the fathers and arranged as answers to questions.
Why it lasted
The standard medieval handbook on the last things, and a principal source for the West's developing idea of an intermediate state.
Where to read it
This work is in the public domain and can be read in full, free, at the archives below. The Library catalogues it; it does not host the text.
These open a search on each archive rather than a direct link, which is the honest way to point at an edition nobody here has checked line by line.
Read next