[Verginius Rufus]

I think Louis IV was supposed to be Louis XIV. Louis IV reigned from 936 to 954 and was pretty weak, one of the last of the Carolingians. Louis XIV, on the other hand, was the Sun King and dominated Europe.

The first sentence is ambiguous, since it is about 15 centuries ago that the Franks accepted Christianity (Clovis, the first Christian king of the Franks, died in 511). Obviously that's not what the author had in mind.

[Mount Athos]

He’s algerian referring to Algeria.

He meant Louis IX, canonized king who went on two crusades