A Frankish royal estate associated with Charles Martel’s death in 741.
Quierzy (Kiersy) was a Carolingian royal estate on the Oise in northern France, used as a palatial residence and assembly point by Carolingian rulers. The Edict of Quierzy in 877 — in which Charles the Bald formalized arrangements for the heritability of benefices and counties — is the most significant document associated with the site.
The Edict of Quierzy is often cited as a step in the transformation of Carolingian administrative grants into hereditary noble holdings, contributing to the development of feudal structures in late Carolingian France. Whether it was a formal legal turning point or a practical concession is debated, but the estate's connection to this document gives Quierzy a defined place in Carolingian institutional history.