The name of Gergur Pythiraeus Mekinić is well known in the history literature of Burgenland Croatians only from 1969 when two studies about him were published in were published in the Review for History and Ethnography in Maribor from: Ivan Škafar (1912-1983) and Marijan Smolik (1928-2017). The authors of the studies discuss the hymnals Duševne pesme (Spiritual songs 1609, 1611) which were the first printed hymnal in the Slavic south intended for Burgenland Croatians living in Sveti Križ in western Hungary. The only specimen of these hymnals is currently in the Seminary Library in Ljubljana where it was again discovered by Marijan Smolik in 1968. These same hymnals were reprinted in 1990 by Alojz Jembrih (1947-) who added an extensive epilogue in the edition of National and University Library in Zagreb, Croatian Cultural Association in Burgenland, and Kršćanska sadašnjost in Zagreb. On the 400th anniversary of Gergur Mekinić’s death, we discuss these hymnals and their author. People in Croatia considered the Protestant literature to be an insignificant phenomenon of no value to Croatian literature and language for a long time. This is the reason why even in the 21st century the study of Protestant literature is still marginalized. The latter is evidenced by the fact that Mekinić’s Croatian hymnals as first of their kind were not adequately acknowledged neither in the history of Croatian language nor in the history of Croatian spiritual music. Therefore, it is desirable that Croatian musicologists and linguists start studying Mekinić’s hymnals. The purpose of this article is to encourage them to commence research.