Louis was the first member of the House of Capet to make a lasting contribution to the centralizing institutions of royal power. He spent almost all of his twenty-nine-year reign fighting either the "robber barons" who plagued Paris or the Norman kings of England for their continental possession of Normandy. Nonetheless, Louis VI managed to reinforce his power considerably and became one of the first strong kings of France since the division of the Carolingian Empire in 843.
Louis was a warrior king but by his forties his weight had become so great that it was increasingly difficult for him to lead in the field. A biography - The Deeds of Louis the Fat, prepared by his loyal advisor Abbot Suger of Saint Denis - offers a fully developed portrait of his character, in contrast to what little historians know about most of his predecessors.
Suger tells us: "In his youth, growing courage matured his spirit with youthful vigour, making him bored with hunting and the boyish games with which others of his age used to enjoy themselves and forget the pursuit of arms." And..."How valiant he was in youth, and with what energy he repelled the king of the English, William Rufus, when he attacked Louis' inherited kingdom."
Louis married Lucienne de Rochefort, a French crown princess, in 1104, but repudiated her three years later. They had no children.