Abstract
The relatively short history of the Transylvanian Principality (one hundred and fifty years or so) was full of unexpected changes. From the tragic Battle of Mohács, fought against the Ottoman invasion (1526), until the Diploma Leopoldinum, which integrated the Principality in the huge Habsburg Empire, events like the rise of Lutheran, Calvinian or Unitarian reforms, the Catholic Reformation or Counter-Reformation – despite the Edict of Torda in 1568, which declared religious tolerance and freedom of conscience – brought forth more disagreements. In the 1670s a new population coming from Moldova appeared in the Principality: the Armenians. The history of the establishment of this population was mentioned by the Catholic priest István Lakatos in his work Siculia (1702). Through the analysis of this work, we search for answers to the question regarding the relatively short integration period of this ethnic group.