This paper was prepared in 1964 as a thesis for the Tokio ISFNR conference report, but the author couldn’t participate in this conference. This report deals with identical motifs in the European (Czech and Moravian) folklore and in the non-European sources, namely in the Near East ones. It mentions cooperation of folkloristics with comparative linguistics and archeology. Benefit of this cooperation is evident especially in the ancient culture studies, when the folkloristics can utilize the results of the archeological discoveries. A thorough study of those ancient discoveries proves that roots of some European literary traditions may be found already in Mesopotamia (motifs of dragons and demons, etc.).