Why do the different Christian churches still celebrate the Lord's Supper separately? The discussion about this fundamental issue of ecumenical dialogue keeps coming back to two concepts that play an important role: (mutual) recognition and reception. In the end, it is about recognition of the other churches as an expression or form of the one church of Jesus Christ. This is only possible, however, if all the parties involved accept, within a process of reception, the insights they have formulated together. This volume documents the papers given at the 19th academic consultation of Societas Oecumenica (European Society for Ecumenical Research), and which deal with these two concepts from different perspectives and approaches and their importance or potential for the ecumenical movement.