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The Church Fathers · c. 605–615
The Book of the Union
Babai the Great · c. 551–628
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What it is
A systematic christology of two natures and two hypostases in one person of union, worked out for a church living under Persian rule with no emperor to appeal to.
Why it lasted
The definitive doctrinal statement of the Church of the East, still its official christology fourteen centuries later.
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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