Gin originated in the Low Countries, the region that is now the Netherlands and Belgium, where grain spirits flavored with juniper berries became widely popular during the 16th century. The drink was originally called “jenever,” the Dutch word for juniper, and it evolved over centuries from a medicinal tonic into the spirit we recognize today. But the story stretches back further than most people realize, with roots in medieval Italian monasteries nearly 500 years before the first bottle of London Dry.
Medieval Monks and Juniper Tonics
Long before anyone was mixing cocktails, juniper-flavored drinks existed as medicine. Around 1055, a collection of treatments compiled under the name Compendium Salernita included a recipe for a tonic wine infused with juniper berries. Benedictine monks in Salerno, Italy, are thought to have used early distilling knowledge to make alcohol that could dissolve and preserve medicinal plants, including the juniper that grew abundantly in the nearby hills.
Even earlier, in 1270, a Flemish writer named Jacob van Maarlant described a medicine made from juniper berries boiled in wine in his book Der Naturen Bloeme (The Flower of Nature). These weren’t gin in any modern sense. They were crude herbal preparations. But they established juniper as a go-to botanical for European healers, setting the stage for what came next.
Jenever Takes Shape in the Low Countries
By the 16th century, distillers in the Low Countries (the “Seventeen Provinces” that included modern Belgium, the Netherlands, and French Flanders) began producing grain brandy flavored with juniper berries. This was jenever, and it caught on fast. Early versions were distilled from flat beer, but by the end of the 1500s the spirit had become popular enough that distillers switched to fermenting grain mash made from barley, rye, and malt. The result was a richer, maltier spirit, closer to a flavored whiskey than to the clean, dry gin you’d find on shelves today.
A persistent myth credits a Leiden University professor named Franciscus Sylvius with inventing gin around 1650. The story claims he created a diuretic medicine using ingredients from the university’s botanical garden. But as researchers at Leiden University itself have pointed out, jenever’s precursors had been popular for a very long time across the Netherlands and Europe well before Sylvius was born in 1614. Juniper berries are indigenous to the Benelux region, making them a natural addition to local drinks. Sylvius may have refined the recipe and helped popularize the spirit, but he didn’t invent it.
How Gin Crossed the English Channel
English soldiers first encountered jenever during the wars of the 17th century, likely during the Thirty Years’ War (1618 to 1648) and the Anglo-Dutch Wars (1652 to 1674). One popular account says soldiers drank jenever for its calming effects before battle and its warming properties in cold weather. Another version claims the English simply noticed how brave Dutch soldiers seemed after drinking it. Either way, this is where the phrase “Dutch courage” comes from.
The spirit made the jump to England in earnest when the Dutch-born William of Orange took the English throne in 1689. His government encouraged domestic distilling and placed heavy tariffs on French brandy, creating perfect conditions for gin to flourish. The English shortened “jenever” to “ginever” and then simply to “gin.” Within a few decades, cheap gin flooded London, leading to the notorious Gin Craze of the early 1700s, when consumption spiraled so far out of control that Parliament passed multiple acts trying to restrict it.
From Rough Spirit to London Dry
Early English gin was not a refined product. The base spirit was often harsh and full of impurities, so distillers masked the rough flavors with sweeteners like liquorice, aniseed, or lemon. This sweetened style eventually became known as “Old Tom” gin, a broad category that covered most pre-modern gins. In the early days, sweet and aromatic botanicals did the heavy lifting. As sugar became cheaper in the mid-to-late 1800s, distillers shifted to simply adding sugar directly.
The real transformation came in 1830 when an Irish inventor named Aeneas Coffey patented a revolutionary continuous still. His design separated the distillation process into two vertical columns, one for stripping alcohol from the wash and one for purifying it through a series of metal plates fitted with valves. This produced a far cleaner, more neutral spirit in a single continuous operation rather than in batches. Coffey’s still spread to nearly every large grain distillery in Britain, and the cleaner base spirit it produced meant distillers no longer needed sweetness to cover up bad flavors.
By the end of the 19th century, unsweetened “dry” gin was gaining ground, driven partly by the growing fashion for dry champagne in England. These clean, juniper-forward gins were close in style to what we now call London Dry. Old Tom didn’t vanish entirely. A handful of brands survived into the 20th century, typically containing 2 to 6 percent sugar and made mostly for export to Finland, Japan, and parts of the United States. But London Dry became the dominant style worldwide.
Gin and Tonic: A Colonial Medicine
Gin’s most famous pairing has medicinal origins, too. In the 19th century, British soldiers and sailors stationed in tropical colonies faced constant risk of malaria. Quinine, a compound extracted from tree bark that disrupts the malaria parasite’s ability to reproduce, was the best available preventive treatment. It was dissolved into tonic water, but the taste was intensely bitter and unpleasant.
The practical solution was to mix the tonic with gin, lime, and sugar. British military doctors had already discovered that adding citrus peels helped prevent scurvy, so the combination served double medicinal duty. The gin and tonic as we know it was essentially born in India, distributed by the Royal Navy as a health measure that happened to taste good enough to survive long after quinine was no longer the frontline malaria treatment. Modern tonic water contains far less quinine than the colonial version, making it more of a flavor note than a medicine.
What Makes Gin Legally “Gin”
Today, gin’s identity is defined by law. Under European Union regulations, gin must be a juniper-flavored spirit made by flavoring ethyl alcohol of agricultural origin with juniper berries, bottled at a minimum strength of 37.5 percent alcohol by volume. Juniper must be the predominant taste, the single sensory characteristic that distinguishes gin from other spirits.
That juniper flavor comes from the berry’s volatile oils, which are rich in compounds called pinenes (responsible for the piney, resinous notes), sabinene (woody and spicy), and limonene (citrusy). These make up the bulk of juniper’s aromatic profile and are why gin tastes unmistakably like gin, whether it’s made in London, Amsterdam, or anywhere else. Beyond juniper, distillers are free to add other botanicals, which is why modern gins range from floral and citrus-forward to spicy and herbaceous. But without juniper in the lead, it’s not gin.