S
Syele
Guest
Thanks I did google a bit before asking, I will search this site more as well. so far I only found the rules not the whys. I didnt look for GIRM as Im not too familiar with that.I am sure there are multiple ones, but I do not know which. Google the GIRM or Rubrix for the Catholic Church. That may help. I am sure that the Sacramental part of this board will, as might ask a apologist and the catholic.com site.
Long and short, the bread is to be as close to passover bread as it can. The wine must be grape wine. That is what Jesus used.