Why Addresses Have Numbers

Before the 18th century, European cities identified buildings by owner, trade, or painted signs rather than numbers, relying on local knowledge and landmarks for navigation. As cities grew beyond 50,000 people and institutions like insurance companies and tax administrators needed systematic records, governments began implementing numbered address systems to locate everyone uniformly and efficiently. This shift from descriptive, trade-based identification to numerical addresses represented a major administrative transformation that organized modern urban life.