The need to duplicate written content led to the establishment of various duplicating techniques. The most important invention of this kind is Gutenberg's printing press, where the "Gutenberg Bible" was printed, by Johannes Gutenberg around 1455. Over time, the printing trade began to flourish, so printing workshops were opened in Croatia and Poland. Kosinj printing workshop and Senj printing workshop are the two most famous printing workshops in Croatia. We cannot attribute a single printed work to the printing workshop in Kosinj with certainty, on the other hand "Senjski glagoljski misal" was the first work printed in the printing workshop in Senj. The most famous printing workshop in Poland was the printing house of Hochfeder and Haller, which was located in Krakow and operated from 1503 to 1509. Blaž Baromić, Andrija Paltašić and Šimun Kožičić Benja are the most significant names for printing in Croatia, while Kasper Hochfeder, Jan Haller, Kasper Straube and others contributed to the development of printing in Poland. „Misal po zakonu rimskoga dvora“ was the first book printed in the Croatian printing house in native language, in 1483. The first prints in Poland include the Polish translation of the title "Historyja umęczenia Pana naszego Jezusa Chrystusa" from 1508. The scientific discipline, incunabulistics, deals with the question of the first printed books or so-called incunabula.