Two faces, and only two. A third would break the spell.
Your grandmother's laurel, drawn as an 18th-century engraver would have cut it — an open sprig with distinct leaves, never a closed wreath and never a border. It appears once on every piece, small, the way an engraver signs a plate. The one place it does not appear is the invitation itself: there, the E&M cipher takes the whole card, and the laurel steps back so the cipher can be the thing you remember.
This is your event's visual identity. If you make anything yourselves — a welcome sign, a printed programme, a note to a vendor — use these exact colours and these two faces, and keep the laurel to one appearance per piece. Everything will keep feeling like one event. Two things to hold to: the gold never carries words a guest has to read, and the Bordeaux appears once and only once.