'', Count Cavour played a significant role in the development of modern-day Barolo Until recently it was believed that up to the mid-19th century, Barolo was a
sweet wine. This was attributed to the fact that the nebbiolo grape
ripens late in October, meaning that temperatures would be steadily dropping by
harvest. By November and December, temperatures in the Piedmont region would be cold enough to halt fermentation, leaving a significant amount of
residual sugar in the wine. Another popular idea was that in the mid-19th century,
Camillo Benso, Conte di Cavour, the mayor of Grinzane Cavour, invited the French
enologist Louis Oudart to the Barolo region to improve the winemaking techniques of the local producers. Using techniques focusing on improving the hygiene of the cellar, Oudart was able to ferment the nebbiolo
must completely
dry, making the first modern Barolo. This new, "dry" red wine soon became a favourite among the nobility of
Turin and the ruling
House of Savoy, giving rise to the popular description of Barolo as "the wine of kings, the king of wines". By the mid-20th century, wine production in the Barolo zone was dominated by large
negociants who purchased grapes and wines from across the zone and blended them into a house style. In the 1960s, individual proprietors began estate bottling and producing
single vineyard wines from their holdings. By the 1980s, a wide range of single-vineyard bottlings was available, which led to a discussion among the region's producers about the prospect of developing a Cru
classification for the area's vineyards. The cataloguing of Barolo's vineyards has a long history dating back to the work of
Lorenzo Fantini in the late 19th century and
Renato Ratti and
Luigi Veronelli in the late 20th century, but as of 2009 there is still no official classification within the region. By using modern technology, including specialized tanks that allow the wine to be pumped out from underneath the
cap of skins and then pumped over, they found ways to maximize colour extraction and minimize harsh tannins. Prior to this "modernist" movement, nebbiolo was often
harvested slightly unripe and at high
yields, which left the grapes with harsh green tannins that had not had time to fully
polymerize. To maximize colour extraction, producers subjected the wine to extended periods of maceration, taking up to several weeks, and then several years of ageing in large oak casks to soften the wine. Through the long slow process of
oxidation, the perception of tannins lessened (such as occurs when
decanting wine), but the fruit would also fade and become oxidized. The decline in fruit would no longer be able to balance the remaining harsh tannins, leaving a bitter, astringent wine with withered fruit. To counter this change, some producers would blend in other grape varieties such as
Arneis and
Barbera to add colour, fruit or softness to the wine. Advances in
viticulture have helped to bridge the gap between modern and traditional producers. Better
canopy management and yield control have led to riper grapes being harvested earlier with more developed tannins in the grape skins. ,
winemaking for both traditionalist and modernist Barolo producers includes strict hygiene controls and the use of some modern winemaking equipment such as temperature-control fermentation vessels. Rather than fall into one hardline camp or the other, many producers take a middle-ground approach that utilizes some modernist techniques along with traditional winemaking. In general, the traditional approach to nebbiolo involves long maceration periods of 20 to 30 days and the use of older large
botti-size barrels. The modern approach to nebbiolo utilizes shorter maceration periods of 7 to 10 days and cooler fermentation temperatures between that preserve fruit flavours and aromas. Towards the end of the fermentation period, winemakers often heat the cellars to encourage the start of
malolactic fermentation, which softens some of nebbiolo's harsh acidity. Modern winemakers tend to favour smaller barrels of new oak that need only a couple of years to soften the tannic grip of the wines. While new oak imparts notes of
vanilla, it has the potential to cover up the characteristic rose notes of nebbiolo. ==Climate and geography==