The author analyses in detail the unpublished text (Gens Boemica), uniquely preserved in the manuscript of the National Library of the Czech Republic, Prague, III G 16, fol. 62rv. First, it takes note of the circumstances of its entry in the given codex, then its formal and content aspects; based on the subsequent historical analysis, the conclusion is drawn that it is and as-yet unknown Hussite manifesto, which reacts to the collapse of the meeting of the adherents to the calix with Sigismund in Cheb in May 1431. The author also follows the place of the investigated manifesto in the sequence of known agitation publications from the summer of 1431 and discovers new intertextual and chronological connections. An edition of Gens Boemica, a collation of a newly traced manuscript of Cesarini´s manifesto with an edition by Bohumil Ryba and a schematic outline of the agitation publications from the period before the battle at Domažlice are attached to the study., Dušan Coufal., and V příloze pražský manifest „Gens Boemica” (editio critica)