Trademark plaque of Jan van der Heyden's fire engine workshop from the wreck of the Dutch East India ship Hollandia before 1748

This small, circular plaque is a trademark of Jan van der Heyden's fire engine workshop. It depicts a lion, a symbol of strength and courage, with a serpent wrapped around its body. The plaque was found in the wreck of the Dutch East India ship Hollandia which sank in 1748. Jan van der Heyden was a Dutch Golden Age painter and inventor, known for his detailed cityscapes and innovations in fire-fighting technology. This plaque is a tangible reminder of his workshop and its role in the development of fire-fighting in the Netherlands.