The codex was written by one author, probably a Carthusian monk, who finished his work on 23 November 1527, the day of Saint Clement, according to the last page.
In the 17th century it was the property of the Seminary of Nagyszombat (today: Trnava, Slovakia), whence through abbot Ferenc Stipsics, it was moved to the library of Hungarian National Museum in 1814.
The content of the work is sermons for the whole year; additionally in one part it contains the legends of ninety most important Saints.
The codex itself was based on Latin works of Pelbart of Temesvár from the 15th century.
The name was given to it by Ferenc Toldy in honour of its first editor, János Érdy.