The prolific life of this eminent scholar has confidently aroused interest in his person and aimed at multiplying efforts to benefit from his wisdom and rich experience. Likewise, I also bury in my memory this kind of inner feelings, of which I have accumulated no small number while building a world of historical interest. The name of Professor Józef A. Gierowski had already sunk into my memory several decades ago. I reached for his publications when I had not yet crystallised a clear direction of interest. Nevertheless, I persistently reached for his texts to “taste” the problems of the 17th and 18th centuries.