Secondary Fermentation: The process that creates the bubbles in sparkling wine. As the wine is bottled, a small amount of yeast and sugar is added before the bottle is sealed with a sturdy crown cap.

Ancestral Method: An inexpensive but risky and difficult-to-control method of producing sparkling wine, and almost certainly the oldest, in which the primary fermentation is stopped before completing, ...

The property encompasses sites where the method of producing sparkling wines was developed on the principle of secondary fermentation in the bottle since the early 17 th century to its early ...