thank you Aniki Meiski!!! you are always a savior, be it here or for Ergo Proxy!!!
Everyone check out the Chevalier merch available already:
http://www.chevalier.tv/goods.html
the red written on the shirts, "Sit nomen Domini benedictum," means "Blessed be the name of the Lord."
That's what is written on his sword. I researched and found it to be part of a Latin Prayer that is often used by Bishops instead of a priestly blessing.
Henri 1V (1589-1610) the first Bourbon King, had new coins minted for France. These coins had Sit nomen Domini benedictum on them. (for a picture of the coins, see here:
http://home.eckerd.edu/~oberhot/fh4bg.jpg). All of the Bourbon kings up to Louis XVI has this on their coins. Louis XV, the king during the anime, had it, too. (pic of his coins here:
http://home.eckerd.edu/~oberhot/fl15dixbg.jpg)
- and for more details of the Bourbon coins, should you care, go here:
http://home.eckerd.edu/~oberhot/froybour.htm