Dimitriy Dan (1856–1927) was a priest, ethnographer, historian, publicist, member of the Romanian Academy of Sciences. Thanks to his publications in German, his works became available to scientists of the Austro-Hungarian Empire and other countries. His works have been included in bibliographic indexes during his life, reviews of them have been published in leading scientific journals of that time. The purpose of this article is to outline the main directions of D. Dan's research and to make a classification of his works, as well as a generalization of the international perception of his creative heritage. Source base. The work is based on search work in museum institutions, archives, libraries of Chernivtsi (Ukraine), Chisinau (Republic of Moldova), Suceava (Romania), the use of special information and search systems on the Internet (including the use of online archives of European journals , almanacs, societies, libraries, etc.). This made it possible to analyze leading magazines in the field of history and ethnography, Bulletins of National Libraries, Materials of International Congresses and Conferences, albums of the period 1890-1918 of such European countries as France, Poland, Germany, Austria, Bulgaria, Russia, Hungary, Great Britain and USA in the period 1890–1927. Secondly, to analyze the international perception of D. Dan's scientific works among scientists in Europe and the USA in the period after D. Dan's death (1927) until the present day. Methodology: bibliographic analysis, use of special information and search systems on the Internet. The research is relevant for the comparative determination of the importance of the researches of different scientists. A more in-depth classification of D. Dan's works (Appendix No. 1), an analysis of international significance, and the use of special search engines on the Internet confirm the novelty of the proposed article. Conclusions. A detailed study of D. Dan's creative heritage allows us to classify his works into the following categories: historical works; “monographs of villages”; description of different ethnic groups of Bukovyna; ethnography and folklore; sermons and articles devoted to spiritual and church matters; museology, protection of historical monuments and paleography; toponymy and natural history of Bukovyna; journalistic works; translations of works; memoirs, reviews and obituaries. The analysis of leading magazines and yearbooks, Bulletins of National Libraries, materials of International Congresses and Conferences, albums, bibliographic and scientific works gives us grounds to state the wide lifelong recognition of the importance of D. Dan's works in Bukovina, in the Austro-Hungarian Empire, as well as in such countries as Germany, Great Britain, USA, France, Poland, Russia, Bulgaria, Hungary; as well as in the period after his death among scientists in Europe and the United States. This testifies to the recognition of the value of his works by the international scientific community. His works devoted to ethnic groups of Bukovyna became the most famous, mainly those published in German. The analysis showed that the works of D. Dan, as one of the first and authoritative researchers of ethnic groups of Bukovyna, are still referred to in Europe and the USA.