The House of Capet was a royal dynasty that ruled France from 987 to 1328. Founded by Hugh Capet, it marked the beginning of a new era in French history. The Capetians expanded their influence through strategic marriages and territorial conquests, establishing a strong centralized monarchy. The dynasty is notable for its long-lasting impact on France, as it laid the groundwork for future royal houses. The Capetian lineage includes several important kings, such as Louis IX and Philip IV, who contributed to the development of the French state and its institutions.