One of the most intriguing of the plague doctor images we’ve found is a painted coat of arms belonging to Theodore Zwinger III (1658–1724), a Swiss doctor and descendant of Theodore Zwinger I (1533–1588), the Swiss doctor and humanist whose Theatrum Humanae Vitae is considered, the historian Helmut Zedelmaier writes, “perhaps the most comprehensive collection of knowledge to be compiled by a single individual in the early modern period”. The painting depicts a plague doctor on one side of a blazon and a man in a ruff on the other — perhaps representing both the medical and the scholarly traditions of the Zwinger clan? Some sort of duality is being represented, at any rate — and the extraordinarily avian plague doctor (even his eyes look birdlike!) lends something mysterious to the picture.