1. University of Pennsylvania, Ms. Codex 1593 DS ID: DS1422 Title: Confutatio libelli Philippi Melanchtonis cuius titulus est De officio principum Author: Nikolaus Apel Date: 1540.
2. University of Chicago, Codex Ms. 178 DS ID: DS16732 Title: Counter-Reformation texts Author: Johann Eck Date: ca. 1580].