E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Limbus Fatuorum.
The Limbus of Fools, or Fools Paradise. As fools are not responsible for their works, they are not punished in Purgatory, but cannot be received into Heaven; so they go to a place called the Paradise of Fools.
1
Then might you see
Cowls, hoods, and habits, with their wearers tossed
And fluttered into rags; then relics, beads,
Indulgences, dispenses, pardons, bulls,
The sport of winds. All these, upwhirled aloft,
Into a Limbo large and broad, since called
The Paradise of Fools.
Milton: Paradise Lost, book iii. 48995.
One cannot wonder that Miltons great poem was placed by the Catholics in the Index of books forbidden.