The document outlines the early Christian community's practices and significant historical milestones in church history, focusing on key concepts such as kerygma, koinonia, diakonia, and leitourgia. It highlights important events like the conversion of Saul, the Council of Jerusalem, and the Edict of Milan issued by Constantine, which established Christianity as a legitimate religion in the Roman Empire. Additionally, it details the evolution of church authority and significant theological developments from the early church to the Counter-Reformation.