A vernacular poem of his fellow-countryman Smil Flaschka of Pardubitz
, entitled Nova Rada, was Dubravius's most important model.
Dietrich here draws on the previous work of Ingrid Schulze, who had called attention to Karl IV's particular devotion the Three Holy Kings, and on the important study by Robert Suckale on the Glatz Madonna commissioned by Prague's first archbishop, Ernst von Pardubitz
. The iconography of the Virgin as Empress, and of Joseph as patriarch are additional ties to the imperial court at Prague, while the style of the Madonna of Jan Ocko, as well as of some of the Karlstein frescoes, is seen in the funerary chapel of Johann von Redekin (d.