first time in November 2001 . We are proud to announce this on the cover of each subsequent volume . Over the past nineteen years, we have published over 50 volumes of the journal, which means more than 300 peerreviewed scientific articles, dozens of source editions, dozens of review articles and reviews, countless bibliographic notes and communications concerning the most important and interesting scientific events taking place in Poland and abroad . Over the years, we have changed the

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... l team, the cover design, and the list of chapters . We have discussed the frequency of publications, deciding in 2011 to take a risky step, thanks to which we can publish four volumes of "Klio" a year . We have introduced an open electronic publishing process support system . We have made an effort to provide the worldwide recognition of our publications, giving all texts DOI identifiers, adding abstracts, titles and keywords in English . We strive for the availability of our texts by publishing all volumes in open access and placing them in international indexing databases, including the ERIH Plus or the Central European Journal of Social Sciences and Humanities . We continue to develop for our authors and readers . This is important because we are convinced that it is only way to provide a comfortable and professional space for the exchange of thoughts to everyone interested in our publications . Klio . Czasopismo poświęcone dziejom Polski i powszechnym PL ISSN 1643-8191, t . 55 (S)/2020, s . 3-5 http://dx .