Abstract
Analysis of three codices written by Mattheus Beran, Augustinian Canon from Roudnice nad Labem (Raudnitz) during the first decades of the 15th century. They are: Prague, Library of the National Museum XVI E 11 (a sermon collection, the so called Confundarius minor from 1417), Prague, National Library I.F.35 (a miscellany, the so called Confundarius maior, written in exile, partly in Erfurt 1421-1431), and Prague, Metropolitan Chapter Library, Prague Castle Archive N.53 (a miscellaneous ms. with a number of mediecal texts written partly in Erfurt, then in Bohemia 1437).