I don't know the english term, in Dutch it's called relatieve aansluiting (relative connection?). A relative pronoun can have a similar meaning as a conjunction and a relative pronoun together, i.e.: qui = et qui.
quae res: et quae res: and this thing (i.e. visiting the curia) made him hear and see famous man.
At least, this is how I saw this piece. Others may be more enlightening...