When the Roman Empire fell, the Church became wine's guardian. Wine was needed for Mass, and the monasteries had the knowledge, labour and patience to grow it.
Monks as researchers
In Burgundy, Cistercian and Benedictine monks spent centuries observing their vineyards. They noticed that grapes from a particular slope, a particular soil, gave wine with its own character year after year.
Terroir takes shape
That observation is the very seed of terroir — the idea that place is reflected in the glass. The monks pinned down the best sites, *climats*, many of which are still classified vineyards today.
Champagne and beyond
The monasteries also refined technique. The monk Dom Pérignon in Champagne is legendary — not for "inventing" the bubble, but for his work on quality and blending.
The patient record-keeping of the Middle Ages is why we can speak of a single vineyard's soul today.