Iron truth —first consumer protection service
Imagine buying a length of cloth in the 15th century. The seller swears he measured exactly three ells. How could you verify the claim? Medieval trading towns had an elegant, harsh answer: they cut, cast, and forged official standards of measure and weight into the walls of town halls and cathedrals. Any buyer could instantly check a merchant's honesty. A market with a reputation for fairness drew traders from across the continent. Those iron and stone rulers survive on the facades of old buildings to this day.