Series Collectanea Vaticana Hungariae new volume I/20. namely Monumenta és Collectanea. Magyar történeti kutatások a Vatikánban (1881–2021). has been published at the end of February 2022. Péter Tusor, leader of Vilmos Fraknói Vatican Historical Research Group, wrote this book which presents precisely Hungarian historical research movements in Rome and Vatican from the beginnings until nowadays. The aforementioned volume's antecedent has been published as a prologue for Research Group's first volume (CVH/1). This volume summarizes the great historian, Vilmos Fraknói's heritage and mission of a modern historical research institute. Here you can get the book.