Page "Summary of Decameron tales" Paragraph 7

Panfilo is the storyteller of the first tale of the entire collection, which is also the first tale ridiculing then-current practices of the Roman Catholic Church ( in this case canonization by the people ).

The earliest source of this story is found in chapter eight of Saint Sulpicius Severus's biography of Saint Martin of Tours.

The biography dates from around 400 AD.