15-16th Centuries
Pope Gregory IX. Decretales. Basel, 1494.
A very early compilation of papal decisions by Raymond of Penafort.
As early as 1230, Raymond was commissioned by Pope Gregory IX
to bring the essential law of the decretals -- papal decisions --
together into a single work. The work was promulgated as church law
in 1234.
An example of incunabula (Latin for "things in the cradle"),
books printed in the first fifty years of printing.