Without any trace of irony, the house number can be considered one of the most important innovations of the Age of Enlightenment, of that century obsessed, as it was, with order and classification.” House numbers were not invented to help you navigate the city or receive your mail, though they perform these two functions admirably. Instead, they were designed to make you easier to tax, imprison, and police. House numbers exist not to help you find your way, but rather to help the government find you.