What have snakes, unicorns and crocodiles got to do with pharmacies? Modern pharmaceutical signs have a long history drawing on Greek mythology, heraldry, founding fathers and medicinal plants. While alchemists used secret symbols to disguise their preparations, pharmacists used the tools of their trade – including medical ingredients, pestle and mortar, and carboys – to promote their profession. In this highly illustrated lecture, pharmacy historian Briony Hudson will share the origins and stories of  many of the visual markers still used today on drug packaging, in pharmacies and on medical buildings in London and beyond.