This contribution brings a critical edition of a short treatise by Jakoubek of Mies and ranks the work among the eldest utraquist works - it originated in August 1414 most probably. Articulus brings evidence that the most important auctoritas of the time when the idea of the cup originated was the vers of Paul's 1. epistle to the Corinthians Probet autem se ipsum homo and it is a relevant testimony of Matej's of Janov influence on the origin of utraquism.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.