Collection of antique perfume bottles on wooden shelves, evoking the history of perfumery

Plague doctors wore beaked masks filled with aromatic herbs and dried flowers because they believed, under the era’s dominant “miasma theory”, that disease spread through bad-smelling air, so filling the mask’s beak with strong-smelling aromatics was thought to filter or neutralise the dangerous air before it reached the wearer.

The medical thinking behind the design

Miasma theory, the belief that disease was carried by foul-smelling vapours rather than by germs, dominated medical thinking for centuries before the germ theory of disease was established. Plague doctors, working during some of history’s worst outbreaks, reasoned that if bad air caused illness, then surrounding themselves with strong, pleasant-smelling aromatics might protect them, or at least mask the overwhelming stench of illness and death they were constantly exposed to. The distinctive beak shape of the mask wasn’t decorative; it was specifically designed as a chamber to hold these aromatic materials close to the nose and mouth.

We cover exactly which aromatic materials were typically packed into these masks in our related answer on what ingredients plague doctors used in their masks. It’s a striking historical example of perfume being used for genuinely believed medical protection rather than purely for pleasure or status. Our history of perfume guide covers this era properly, and the complete guide to perfume has the wider historical picture. It’s a vivid, if slightly unsettling, reminder of how seriously earlier generations took the perceived power of strong scent.