[German version] Since the 4th cent. the term m issa (‘mass’) has been in use in the western church for the Eucharist that is celebrated in all Christian churches, mostly on Sundays. According to the Synoptic Gospels and 1 Cor 11, this celebration goes back to Jesus himself. In the post-Apostolic period (around 100/beginning of the 2nd cent.), it is first mentioned by the Didachḗ . Iustinus [6] (around 150) refers to the bipartite nature of the church service: reading and explanation of the Holy Scriptures on the one hand, and the offering, blessing and distr…