The present research aims to approach the theology of the Eucharist, elaborating some historical, systematic and liturgical notes, having as reference and inspiration the first three centuries of Christianity. It begins with a general approach to this period from the historical and theological points of view. In a second moment, it elaborates a biblical and theological vision of the Eucharist from the Holy Fathers. Finally, the focus of the research is on the experience of the Eucharist in the current Christian community.