The paper on the topic:„ Information Systems on the Sound of Međimurje: Međimurje Songs as Confirmation of Međimurje's Belonging to the Croatian Cultural, Ethnic and Territorial Space“, explores the importance of folk songs, the intangible cultural heritage of Međimurje, which was the key evidence of the identity of the Međimurje Croats in Međimurje who found themselves in Hungary at the beginning of the 20th century. Young Croatian intellectuals recognized the urgent need to develop the political consciousness of the Međimurje Croats, which led to their reunification with Croatia. The building of political and national consciousness among the Međimurje Croats was initiated by: Ivan Novak, Vinko Žganec, Luka Purić, Juraj Lajtman and Ignacije Lipnjak. Their work created the conditions for the liberation and annexation of Međimurje to Croatia after the First World War. Despite the systematic anti-Croatian propaganda in Međimurje, which was carried out through the administration, schools, culture, music and language, they managed to preserve the Croatian language, customs and folk songs that became evidence of the Croatian identity in Međimurje. Collecting Croatian Međimurje songs to preserve them from oblivion, Žganec had no idea that they would become the most valuable document and evidence that Croats live in Međimurje and that it is an integral part of Croatia, not Hungary. In collecting them, he had great help from Florijan Andrašec and Ivan Mustač Kantor.