The Reformation · 1549–1551
The Decades
Heinrich Bullinger · 1504–1575
What it is
Fifty sermons covering the whole of Christian doctrine, written for clergy who needed a course of instruction they could preach through.
Why it lasted
Required reading for English clergy under Elizabeth, and probably the most widely used Reformed textbook in sixteenth-century England.
Where to read it
This work is in the public domain and can be read in full, free, at the archives below. The Library catalogues it; it does not host the text.
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.
Read next