Most of the material originated in the Ravennan chancery, but some was sent there from elsewhere in Italy, such as Rome or Syracuse.
Latin papyri from western Europe are rare, and early palaeographers were greatly interested in the Ravennan examples.
They are an important source for legal procedure in Late Antiquity and in the Exarchate of Ravenna.
Sixty or so texts come from between 445 and the mid-7th century, with the latest of this early group being variously dated to 642/3 or 665/6.
A late group of texts from the 9th and 10th centuries also exists, but is substantially less well studied.