This book does not only deal with the history, but also with the effects of the Reformation over the mentality, education and scientifical research among Hungarians during the last five centuries. The spirit of the Reformation has not only been a church-forming factor, but also a force of nation-building and salvation. This volume includes 17 studies of Hungarian Reformed theologians presented at a conference in November 2016. The main goal was to give an overview of the most recent research results in history and theology regarding Reformation and its effects over society and mentality among Hungarians. The contributors come from various Hungarian theological universities from the Carpathian basin, thus the book is an overview of their research topics and results. The City Cluj-Napoca was, became and remained an important center of the Reformation, as significant events took place in its surroundings as well. The Faculty of Reformed Theology of the Babeș-Bolyai University and the Protestant Theological Institute has always functioned in an environment, where the challenges of multi-confessionalism and multiethnicity are also present beside interdisciplinarity.