The Capetian dynasty was a royal family that ruled France from 987 to 1328. It began with Hugh Capet, who became king after the last Carolingian monarch. The dynasty is known for establishing a strong centralized monarchy and expanding the French territory through strategic marriages and alliances. Over the years, the Capetians produced several notable kings, including Louis IX, also known as Saint Louis, who was famous for his piety and justice. The dynasty eventually led to the emergence of the Valois and Bourbon branches, which continued to shape French history long after the Capetians.