"Moralitates" is the least known and least explored among the texts written by Emperor Charles IV. The study presents a critical edition of this text and analyzes its manuscript tradition. Apart from the singular manuscript that has been known in the scholarship so far, another copy is nalyzed here (Prague, National Library, XIX B 5). Moreover, the question of the title of the "Moralitates" is discussed here. The study attempts to identify the bearer of the name "Zedekiah" (Sedechias) who is mentioned at the beginning of the text – he seems to be not a biblical figure, but in all probability a mythical Eastern sage. The most significant fact that emerged from the textual analysis is that the first part of "Moralitates" is an almost verbatim translation of the "Liber philosophorum moralium antiquorum" by John of Procida (1210–1298). The study is supplemented by an edition of an epitaph for Sigismund of Luxembourg.