Palais de papes

The first thing you naturally think about is of course … wine. Well done. And after that first impression you might think about the beautiful centre of Avignon with lots of historic sites and may be even start singing:

Sur le pont d’Avignon,
L’on y danse, l’on y danse,
Sur le pont d’Avignon
L’on y danse tout en rond.

But do you know how to recognize this specific wine if there were no label on the bottle?