Henry I was the King of the Franks from 1031 to his death.
Background
A member of the House of Capet, Henry was born in Reims, the son of King Robert II (972–1031) and Constance of Arles (986–1034). He was crowned King of France at the Cathedral in Reims on 14 May 1027, in the Capetian tradition, while his father still lived. He had little influence and power until he became sole ruler on his father"s death.
Career
The royal demesne of France reached its smallest size during his reign, and for this reason he is often seen as emblematic of the weakness of the early Capetians. This is not entirely agreed upon, however, as other historians regard him as a strong but realistic king, who was forced to conduct a policy mindful of the limitations of the French monarchy. The reign of Henry I, like those of his predecessors, was marked by territorial struggles.
In an early strategic move, Henry came to the rescue of his very young nephew-in-law, the newly appointed Duke William of Normandy (who would go on to become William the Conqueror), to suppress a revolt by William"s vassals.
In 1047, Henry secured the dukedom for William in their decisive victory over the vassals at the Battle of Val-ès-Dunes near Caen. However, Henry would later support the barons against William until the former"s death in 1060.
In 1051, William married Matilda, the daughter of the count of Flanders, which Henry saw as a threat to his throne. In 1054, and again in 1057, Henry invaded Normandy, but on both occasions he was defeated.
Henry had three meetings with Henry III, Holy Roman Emperor—all at Ivois.
In early 1043, he met him to discuss the marriage of the emperor with Agnes of Poitou, the daughter of Henry"s vassal. In October 1048, the two Henries met again and signed a treaty of friendship. The final meeting took place in May 1056 and concerned disputes over Theobald III and County of Blois.
The debate over the duchy became so heated that Henry accused the emperor of breach of contract and subsequently left.
In 1058, Henry was selling bishoprics and abbacies, ignoring the accusations of simony and tyranny by the Papal legate Cardinal Humbert. Despite his efforts, Henry I"s twenty-nine-year reign saw feudal power in France reach its pinnacle.
King Henry I died on 4 August 1060 in Vitry-en-Brie, France, and was interred in Basilica of Street Denis.