The Franks believed that Merovech, a semi-legendary figure, founded their ruling dynasty, which was thus called Merovingian (mehr-uh-VIHN-jee-uhn). The reign of Clovis (r. ca. 481–511) was decisive in the development of the Franks as a unified people. Through military campaigns, Clovis acquired the central provinces of Roman Gaul and began to conquer southern Gaul from other Germanic tribes. His wife, Clotild, a Roman Christian, pressured him to convert, but he refused. His later biographer Gregory of Tours, a bishop in the Frankish kingdom in the sixth century, attributed his conversion to a battlefield vision, just as Emperor Constantine’s biographers had reported about his conversion.

Most historians today conclude that Clovis’s conversion to Roman Christianity was a pragmatic choice: it brought him the crucial support of the bishops of Gaul in his campaigns against tribes that were still pagan or had accepted the Arian version of Christianity. As the defender of Roman Christianity against heretical tribes, Clovis went on to conquer the Visigoths, extending his domain to include much of what is now France and southwestern Germany.

Following Frankish traditions in which property was divided among male heirs, at Clovis’s death his kingdom was divided among his four sons. For the next two centuries rulers of the various kingdoms fought one another in civil wars, and other military leaders challenged their authority.

Merovingian kings based some aspects of their government on Roman principles. For example, they adopted the Roman concept of the civitas — Latin for a city and its surrounding territory. A count presided over the civitas, raising troops, collecting royal revenues, and providing justice. Within the royal household, Merovingian politics provided women with opportunities, and some queens not only influenced but occasionally also dominated events. Because the finances of the kingdom were merged with those of the royal family, queens often had control of the royal treasury just as more ordinary women controlled household expenditures.

At the king’s court an official called the mayor of the palace supervised legal, financial, and household officials; the mayor of the palace also governed in the king’s absence. In the seventh century the position as mayor was held by members of an increasingly powerful family, the Carolingians (ka-ruh-LIHN-jee-uhns), who advanced themselves through advantageous marriages, a well-earned reputation for military strength, and the help of the church.

Eventually the Carolingians replaced the Merovingians as rulers of the Frankish kingdom, cementing their authority when the Carolingian Charles Martel defeated Muslim invaders in 732 at the Battle of Poitiers (pwah-tee-AY) in central France. The Battle of Poitiers helped the Carolingians acquire more support from the church, perhaps their most important asset. They further strengthened their ties to the church by supporting the work of missionaries who preached Christian principles — including the duty to obey secular authorities — to pagan peoples and by allying themselves with the papacy against other Germanic tribes.