On 15th of October 2021 newly published book namely Ordinationum Documenta Pontificia (Collectanea Vaticana Hungariae I/18) by Tamás Fedeles was presented at headquarters of National Archives in Budapest. Mentioned book presentation was organized by National Archives' series 'Medieval Nights' and Fraknói Research Group. After György Rácz host's opening speech Norbert C. Tóth presented the volume. Fedeles collected and published clerics from Hungarian Kingdom who consecrated in Rome between 1425 and 1524. The edition was preceded by systematic Roman research at Apostolic Archives and many other Roman Archives. At the end of the event the author dedicated his volumes.