Is it OK to add here quotes by famous people of historical significance?
Like this one: "Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety."
By Benjamin Franklin.
We have some historic sentences already. I think including them is fine, especially if tagged, as you suggest, with the author name. One suggestion: since modern English no longer capitalizes nouns mid-sentence, it would be best to lowercase these to conform with modern usage. (German will of course continue to follow its own rules.)
There is also the tag "archaic" and others starting with that word. Maybe they are useful.
(If the original is a written source, then keeping the original spelling is appropriate, if one claims it is a quote.)