Despite a vast amount of research on Late Antiquity, little attention has been paid to certain figures that prove to be influential during this time. The focus of historians on Constantine I, the first Roman Emperor to allegedly convert to Christianity, has often come at the cost of ignoring Constantine's predecessor, Diocletian, sometimes known as the "Second Father of the Roman Empire". The success of Constantine's empire has often been attributed to the work and reforms of Diocletian, but there have been very few studies of the man beyond simple biography. This work will attempt to view three of Diocletian's major innovations in order to determine the lasting effect they had over the Roman Empire and our modern world. By studying 1) Diocletian's assumption of new, divinely inspired titles; 2)Diocletian's efforts at controlling prices in the marketplace; and 3)Diocletian's Persecution of the Christians in the Roman Empire at the turn of the fourth century CE, we can gain valuable insight into the ways through which Roman Emperors extended their authority throughout different facets of Ancient World, including developments that would shape the future of Western Civilization for the next 1400 years.

This MA thesis will discuss the reception of common, non-scholarly polytheists (pagans) to the persecution of Christians from the early empire until the Great Persecution (303-313, 322-324). Though modern scholars have addressed this issue and asserted that there was a change in attitude, many have not developed this into anything more than a passing statement. When chronologically analyzing the Christian acts, passions, letters, and speeches recounting the deaths of martyrs deemed historically authentic, and accounting for the literary and biblical topoi, we can demonstrate that the position of non-Christians changed. The methodology of this thesis will chronologically assess the martyr acts, passions, speeches, and letters which are historically accurate after literary and biblical topoi are addressed. These sources are available in the appendix. Throughout this analysis, we will see two currents. The primary current will seek to discern the change in pagan reception of anti-Christian persecution, while the second current will draw attention to the Roman concept of religio and superstitio, both important in understanding civic religion which upheld the pax deorum and defined loyalty to the Roman order through material sacrifices and closely connected to one's citizenship. Religio commonly denoted proper ritual practices, while superstitio defined irregular forms of worship which may endanger the state. As we will see, Christians were feared and persecuted because it was believed that their cult would anger the gods and disrupt the cosmological order. The analysis will begin with a discussion centered on the "accusatory" approach to the Christian church during the first two centuries when the Roman state relied on provincial delatores (denounces) to legislate against the cult. During the first two centuries persecution was mostly provincial, sporadic and was not centrally-directed. We will see that provincial mobs were the most violent during the first two centuries. During the third century the actions of the imperial authority changed and began following an "inquisitorial" approach with the accession of Emperors Decius and Valerian, the former enacting an edict of universal sacrifices while the latter undertook the first Empire-wide initiative to crush the Christian community. It is during the third century that the attitude of non-elite pagans may have begun to change. This will be suggested when discussing the martyrdom of Pionius. When discussing the fourth century Great Persecution under the Diocletianic tetrarchy, it will be suggested that the pagan populace may have begun to look upon the small Christian community sympathetically. The thesis will conclude with the victory of Constantine over Licinius and the slow but steady rise of Christianity to prominence, becoming the official religio of the empire with traditional paganism relegated to the status of a superstitio.

African teacher of rhetoric Arnobius of Sicca, who lived at the turn of the 3rd and 4th century, is one of the less known Christian authors. He is the author of Christian apology written in Latin called Adversus nationes. His statement attracted particular interest of philologists and historians of antiquity, because it contains large amounts of mythological material. The aim of this work is to introduce Arnobius not only as a crucial source of pagan theology, but also as an important Christian witness of the complicated religious - political situation of Christianity in the time before the Milan Edict, particularly at the time of Diocletian's persecution of Christians. Given the need to work with original texts includes this thesis also the first Czech translation of Arnobiusʼ apology.

This thesis explores the history of Christianity and conversion to it in 16th and 17th Century Japan. It argues that conversion is a complex phenomenon which happened for a variety of reasons. Furthermore, it argues that due to the political context and limitations acting upon the mission, the majority of conversions in 16th and 17th Century Japan lacked an element of epistemological change (classically understood). The first chapter explores theories of conversion suggesting that conversion in 16th and 17th Century Japan included sorts of religious change not usually encapsulated in the term conversion including adhesion, communal and forced conversion. Moreover, it argues that contextual factors are the most important factors in religious change. The second chapter explores political context contending that it was the political environment of Japan that ultimately decided whether conversion was possible. This chapter charts the evolution of the Japanese context as it became more hostile toward Christianity. In the third chapter, the context of the mission is explored. It is argued that limitations acting upon the mission shaped post-conversion faith, so that changes to practice and ritual rather than belief became the mark of a successful conversion. The fourth chapter explores methods of conversion, the factors influencing it, and post-conversion faith more directly. It argues that Christianity spread primarily through social networks, but that conversion was also influenced by economic incentive, other realworld benefits, and Christianity's perceived efficacy. Building on Chapter Three, the final chapter also seeks to illustrate that the missionaries were not successful in their attempts to spur epistemological change or instil a detailed knowledge of theology or doctrine amongst their converts.