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The Medieval Church · c. 1332–1334
The Work of Ninety Days
Opus Nonaginta Dierum
William of Ockham · c. 1287–1347
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What it is
A line-by-line refutation of the papal bulls on Franciscan poverty, written in three months, arguing that a pope who teaches heresy forfeits his office.
Why it lasted
The moment a great philosopher turned polemicist, and one of the sharpest medieval arguments that the pope is not above judgement.
Where to read it
Public domain and free to read in full, though not held here. The archives below have it.
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.
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