Ignorantia
Sacerdotum are the first words and also is the
better-known title of De Informatione Simplicium, a
catechetical manual drafted by Archbishop Pecham's provincial Council of
Lambeth
in 1281. It called for
the memorization of the
Apostle's
Creed, the
Ten Commandments,
and the two-fold injunction to "love the Lord thy God with all thy
heart... and thy neighbor as thyself."
It also emphasized the
Seven Virtues,
the
Seven Deadly Sins, the Seven
Sacraments, and the Seven works of
mercy.
A 1357 translation into English is often called the
Lay-Folk's Catechism.
References
Duffy, Eamon.
The Stripping of the Altars:
Traditional Religion in England 1400-1580. New Haven:
Yale University Press, 1992.
55, 6.