Summary Kolozsvár, Klausenburg or Cluj-Napoca? Toponymic terminology and the issue of non-uniform use of geographical names: a focus on the European historical and cultural tradition. This paper aims to explore the issue of non-uniform use of geographical names, with a focus on the European historical and cultural tradition. The analysis refers to toponyms drawn from the history of four European countries: Germany, Romania, Poland and Italy. It reveals the importance of contrasting the different toponyms used for the same place. A place-name form is not merely a variant, but has a definite pragmatic content, which can best be analysed in light of the interdisciplinary approach offered by Toponymy. Toponymy allows us to unveil Europe's partially unexplored historical and Christian roots. The analysis contributes to advancing the study of toponyms from a broader vantage point. It highlights the significance of the didactic experience in introducing young generations to the European heritage of toponyms. Further studies may explore this cultural treasure across different European languages.