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The Medieval Church · 1234
The Decretals of Gregory IX
Liber Extra
Raymond of Peñafort · c. 1175–1275
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What it is
Papal decisions since Gratian, edited into five books and promulgated as the exclusive law of the church, with all earlier collections declared superseded.
Why it lasted
The first universal legal code in European history to be imposed by a single legislative act, and the core of canon law until 1917.
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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