Nowadays, strict fire safety rules are set at parks like Archeon. Therefore, in all houses, we have fire extinguishers present. The city council in medieval times, however, already applied rules. For example, everybody needed to have a bucket of water available next to his or her fireplace and every house should have a loose ladder available on the outside. In case of fire, the ladder was positioned against the neighbouring house and the city inhabitants could with joint forces protect the houses with water against the migrating fire. The burning wooden house itself cannot be saved anymore anyway. The first genuine fire extinguishing apparatus was invented by Jan van de Heijden (1637–1712). But the first real fire extinguisher dates to 1872 and was invented by Thomas Martin.