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The Medieval Church · 1274
The Profession of Faith of Michael VIII
The Second Council of Lyon
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What it is
A statement accepting the filioque and papal primacy, submitted by a Byzantine emperor's envoys to secure Western military protection.
Why it lasted
A union agreed by rulers and rejected outright by the Greek clergy and people — the first demonstration that reunion could not be negotiated over their heads.
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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