Upon closer study, the brief three-voice compositions by Johannes Tourout preserved in Bohemian sources of 15th-century polyphony with Latin texts turn out to be problematic. By analyzing the musical component of these compositions, the author of the study has determined that the works are contrafacta of chansons. At the same time, he has attempted to find the French texts for which Tourouts music may have been originally composed. Although the reconstruction is purely hypothetical, the results are an important argument in the current discussions of the musical culture of Central Europe in the latter half of the fifteenth century., Jaap van Benthem., Rubrika: Studie, and České resumé na s. 238, anglický abstrakt na s. 221.