This paper is an attempt to construct a prosopography of Kentish moneyers in the long eleventh century, that is, from c. 973 to 1135. The starting date is a significant one. In that year King Edgar was crowned and one of his first acts was to reform the coinage of England. In the early Middle Ages, the minting of coin was in principle a regalian right throughout much of western Europe. On the Continent, however, that right had gradually been appropriated by local independent rulers in the course of the ninth and tenth centuries as the unity of the Frankish empire broke down. By contrast, the same period in England saw the emergence of a single coinage for a united kingdom of the English. Edgar's reform of the coinage was the decisive turning point in the process. Before his reign there had been no uniform and kingdom-wide issues, but thereafter a single standardized penny was struck at authorized mints3 across the country. It bore the portrait of the king and his title on the obverse and the names of the moneyer and mint around a central cross on the reverse, and its design was regularly changed. Measures to control purity of silver ensured the integrity of the coinage and the centralization of die production enabled the crown to maintain close control.