There is a particular kind of silence that belongs to underground places. Not the silence of absence, but of waiting - patient, mineral, unhurried. Beneath the streets of Épernay, in France's Champagne region, over a hundred kilometres of chalk tunnels hold millions of bottles in slow, dark repose. The chalk was formed from ancient seabeds. The tunnels were carved by human hands over centuries. The bottles rest in both.

I think of Wisława Szymborska, who understood that the smallest things contain the largest questions. She wrote about a grain of sand knowing it would outlast us all. She might have found something worth examining in a bottle of Blanc de Noirs - white wine made from black grapes - because the central fact of its existence is a kind of quiet paradox. Pinot Noir has dark skin. Its juice, separated quickly from those skins at harvest, runs clear. The colour we expect is not the colour that arrives.

This is the wine that Barbier Louvet produces: a Champagne Blanc de Noirs Demi Sec, carrying the Premier Cru designation. Premier Cru here is not a vague gesture toward prestige. It is a technical classification - a village-level rating of 90 to 99 percent on the historical échelle des crus, the scale by which Champagne has long organised its geography of quality. Épernay sits at the heart of this map. Around it: Hautvillers, where a Benedictine monk named Dom Pérignon worked in the late seventeenth century - not, as legend claims, the inventor of bubbles, but certainly one of the great systematisers of the method that produces them.

Demi Sec is the style that modern drinkers often pass over, drawn as they are to the dry severity of Brut. But Demi Sec - with its dosage of 32 to 50 grams of residual sugar per litre - was once the standard language of celebration across European courts. The Russian imperial court ordered Champagne with dosage levels reaching 300 grams per litre. What we call sweetness, they called proper. Brut, by contrast, is a nineteenth-century British invention - an adaptation made specifically for the English palate, which found the traditional sweet styles excessive. So when you hold a bottle of Demi Sec, you are holding something closer to the original conversation.

I think of Szymborska again. She lived in Kraków. She wrote in a small apartment. She received the Nobel Prize in 1996 and was reportedly alarmed by the fuss. She understood that attention must be paid to ordinary things - a cat in an empty apartment, a conversation interrupted mid-sentence, the view from a window in a specific kind of afternoon light. She would have noted, perhaps, that Pinot Noir and Pinot Meunier - the two black-skinned grapes at the heart of this Blanc de Noirs - are related. Meunier is thought by some to be a mutation of Pinot Noir itself. Family resemblance expressed in chlorophyll and sugar rather than in bone structure and memory.

The aromatic profile of a Blanc de Noirs from this tradition is typically fuller than a Champagne built primarily on Chardonnay. Where Chardonnay offers citrus and chalk and a cool, linear minerality, Pinot Noir vinifié en blanc brings red fruit - small berries, a hint of cherry skin - alongside the brioche and toast that come from autolysis, the slow breakdown of yeast cells during the secondary fermentation in bottle. The mousse, the bubbles themselves, tend to be richer, the structure more generous.

The method is called méthode traditionnelle. It requires a second fermentation to occur inside the sealed bottle. The yeast eats the added sugar, produces alcohol and carbon dioxide - which, having nowhere to go, dissolves into the wine. Then the wine ages on its lees. Then, in a process called riddling - remuage in French - the bottle is slowly rotated and tilted until the spent yeast collects in the neck. Then the neck is frozen, the cap removed, the plug of frozen sediment expelled by pressure. Then the dosage - the small amount of wine and sugar - is added to determine the final sweetness. Then the cork.

All of this to arrive at a clear liquid that betrays nothing of its origins in dark-skinned grapes.

I think of the Bieszczady mountains in southeastern Poland - that quiet, almost forgotten range where the trails go days between human footsteps and the beech forests turn colours that have no precise names in any language. There is something in common between that landscape and this wine: both reward attention rather than announcement. Both are the result of slow processes operating below the threshold of drama. The Bieszczady were emptied of their pre-war population by war and forced displacement - they grew back wild, ungoverned, patient. The chalk tunnels beneath Épernay were carved by slow labour across generations. Time is the operating principle of both.

The classical serving temperature for Champagne is 8 to 10 degrees Celsius. This is not aesthetics. At colder temperatures, the volatile aromatic compounds release more slowly, and the carbonic bite is softened. At warmer temperatures, the wine becomes flatter faster, the sugar more prominent. These are physical facts, not preferences.

Szymborska wrote: 'I prefer the absurdity of writing poems to the absurdity of not writing poems.' There is a similar logic at work in the long tradition of méthode traditionnelle production: the absurdity of the labour involved - the riddling, the disgorgement, the careful measurement of dosage - when simpler methods exist. And yet. The result is a thing with a specific density of attention embedded in it. You can't rush chalk tunnels. You can't rush autolysis.

A bottle of Barbier Louvet Champagne Blanc de Noirs Demi Sec Premier Cru is, among other things, a document of a particular geography - of chalk soil and cold winters and the careful management of grapes whose skins the winemaker must work quickly to exclude. It is a document of a classification system that has been argued over and adjusted for centuries. It is a document of a style - Demi Sec - that was once universal and is now a minor key, worth knowing precisely because it requires a little more context to understand.

Szymborska paid attention to minor keys. So did the underground silence of Épernay's tunnels, year after year, without anyone asking it to.

More information about this wine can be found at darwina.pl - a Polish wine shop that takes the informational side of things seriously.