Four members of the International Ratzinger Symposium, which is held annually in Maynooth, introduced to the former Pontiff.
International marriage experts warn synod delegates that children need marriage and their mothers and fathers to raise them together.
Annual gathering of former theology students took place from 21 to 24 August to discuss the theology of the Cross.
Ratzinger Student Circle meets Pope Emeritus for special Mass.
Participants to attend a Mass celebrated by Benedict XVI at the conclusion of the seminar.