Origin of the Eucharist Christians find the origin of the Eucharist in the Last Supper, at which Jesus established a New Covenant in his body and blood, fulfilling the Mosaic covenant. In this ancient rite or sacrament Christians eat bread and drink a cup as the body and blood of Christ. While certain beliefs and practices regarding the Eucharist may have changed over time and may vary today, the practice itself dates back to apostolic times and the earliest Christian writing. Origin_of_the_Eucharist
Pro Oriente foundation Pro Oriente was founded in 1964 by the Viennese cardinal Franz König to improve relationships between the Roman Catholic and the Eastern Orthodox and Oriental Orthodox churches. The foundation was established during Second Vatican Council which opened the Catholic Church's doors to other religions with its ecumenism-decree "Unitatis Redintegratio". Pro Oriente has charters in Vienna, Graz, Salzburg and Linz. . Pro_Oriente
Catholic–Eastern Orthodox theological differences Catholic–Orthodox theological differences, or more specifically the views of some Eastern Orthodox Church theologians on what they see as differences between their theology and that of the Roman Catholic Church. A number of disagreements over matters of Christian theology and doctrine have developed over the past 1500 years between the ancient churches of apostolic foundation, today commonly known as the Roman Catholic Church and the Eastern Orthodox Church. Catholic–Eastern_Orthodox_theological_differences