Plague doctors most commonly stuffed their beak-shaped masks with dried roses and carnations, along with herbs like lavender and peppermint. These weren’t chosen at random. Doctors in the 17th century believed disease spread through foul-smelling air, and strong, pleasant scents were thought to neutralize the poison before it reached the lungs.
Why Flowers Were Packed Into the Beak
The logic behind the beaked mask rested on a theory called miasma, the idea that “bad air” caused illness by throwing the body’s fluids out of balance. Sweet and pungent perfumes were believed capable of fumigating plague-stricken areas and shielding anyone who breathed through them. The beak’s elongated shape was intentional: the French physician Charles de Lorme, often credited with designing the costume, believed the length gave air more time to pass through the protective botanicals before reaching the doctor’s nostrils.
De Lorme’s original 1619 design was simpler than what most people picture today. During a plague outbreak in Paris, he wore a suit of Moroccan leather and placed garlic and rue in his mouth, frankincense in his nose and ears, and spectacles over his eyes. The iconic beaked mask filled with aromatic materials became widely recognized later, through a set of engravings from 1656. One famous German print described the mask as having “a long beak full of fragrant spices.”
The Most Common Flowers and Herbs
Roses and carnations were the go-to dried flowers. Both have strong, lasting fragrances even when dried, which made them practical choices for a mask that might be worn for hours while visiting the sick. Lavender appeared frequently too, sometimes categorized as an herb, sometimes as a flower. French lavender and English lavender both show up in period recipes for plague remedies.
Peppermint rounded out the most common herbal fillings. Its sharp, cooling scent would have been immediately noticeable with each breath, likely reinforcing the doctor’s sense that the mask was working.
Beyond Flowers: Spices, Resins, and Vinegar
Flowers were only part of what went into the beak. Doctors mixed them with a wide range of other aromatics depending on what was available and what they personally trusted. Common additions included camphor (a waxy substance with a strong, penetrating smell), cloves, juniper berries, myrrh, and a resin called storax. Ambergris, a rare substance produced by sperm whales, also appears on historical lists. Labdanum, a sticky resin harvested from rockrose shrubs, contributed a deep, musky scent.
Some doctors skipped the botanicals entirely and opted for a sponge soaked in vinegar, or combined a vinegar sponge with dried flowers and herbs. The acidity of vinegar was believed to have its own purifying properties, and it would have helped mask the overwhelming stench of plague-ridden homes and streets.
Theriac: The Ultimate Plague Recipe
The most elaborate substance plague doctors used was theriac, sometimes called Venice Treacle. This was a compound containing more than 55 ingredients, and some recipes listed as many as 64. It had been used as a supposed cure-all since ancient times, and plague doctors applied it both inside masks and as a medicine.
Theriac’s ingredient list reads like an entire apothecary shelf. The floral components alone included rose, saffron, French lavender, English lavender, and common centaury. These were mixed with roots like ginger, gentian, rhubarb, and valerian. Spices included cinnamon, black pepper, long pepper, cardamom, anise, fennel, and cloves. Resins like myrrh, frankincense, and benzoin went in alongside gum arabic and turpentine. The whole mixture was bound together with honey and, notably, included viper flesh powder and opium. Even copper salts and Dead Sea bitumen made the list in some formulations.
The sheer complexity of theriac meant that no two batches were likely identical. Apothecaries across Europe had their own versions, and the recipe evolved over centuries. What mattered to plague doctors was the intense, layered fragrance it produced, strong enough to overpower any “poisoned air” they might encounter.
Did Any of It Actually Work?
Plague is caused by a bacterium transmitted primarily through flea bites and respiratory droplets. No combination of dried roses, camphor, or vinegar can filter out bacteria. The masks offered no real antimicrobial protection, and the entire theory behind them was wrong.
That said, the full costume offered some accidental benefits. The heavy leather or waxed fabric suit, gloves, and head covering would have reduced exposed skin where fleas could bite. The mask itself, while not a proper filter, created a physical barrier between the doctor’s face and infectious patients. And the vinegar-soaked sponge, while not a disinfectant in any meaningful sense at that concentration, at least kept doctors from directly inhaling air at close range. These incidental advantages had nothing to do with the fragrance of roses or the supposed purifying power of cloves, but they may have offered a small margin of protection compared to approaching plague victims with no covering at all.