Plague Doctor Mask - the theory was that the plague was caused by smell, so the "beak" would be filled with flowers and herbs
Traditional Plague Doctor Mask with Hat
In the seventeenth and eighteenth centuries, some doctors wore a beak-like mask which was filled with aromatic items. The masks were designed to protect them from putrid air, which (according to the miasmatic theory of disease) was seen as the cause of infection. The protective suit consisted of a heavy fabric overcoat that was waxed.