This is an expansion for Viticulture Essential Edition. You will need the base game to be able to play it.
Description from the publisher:
You have new visitors! Visit from the Rhine Valley, an expansion for Viticulture, provides you with a new set of eighty visitor cards, which focus less on victory points and more on the wine business itself. These cards have their own unique backs as they must be played without other visitor cards from Viticulture, Tuscany, and Moor Visitors.