Germanic kingship is a thesis regarding the role of kings among the pre-Christianized Germanic tribes of the Migration period (c. 300–700 AD) and Early Middle Ages (c. 700–1000 AD). The thesis holds that the institution of feudal monarchy developed, through contact with the Roman Empire and the Christian Church, from an earlier custom of sacral and military kingship based on both birth status and consent from subjects. The term barbarian kingdom is used in the context of those Germanic rulers who after 476 AD and during the 6th century ruled territories formerly part of the Western Roman Empire, especially the Barbarian kings of Italy. In the same context, Germanic law is also derisively termed leges barbarorum "barbarian law" etc. The thesis of Germanic kingship appeared in the nineteenth century and was influential in the historiography of early medieval society, but has since come under criticism for drawing generalizations from limited evidence. Alleged characteristics The Germanic king originally had three main functions: To serve as judge during the popular assemblies. To serve as a priest during the sacrifices. To serve as a military leader during wars. The office was received hereditarily, but a new king required the consent of the people before assuming the throne. All sons of the king had the right to claim the throne, which often led to co-rulership (diarchy) where two brothers were elected kings at the same time. This evolved into the territories being considered the hereditary property of the kings, patrimonies, a system which fueled feudal wars, because the kings could claim ownership of lands beyond their de facto rule. As a sort of pre-Christianization high priest, the king often claimed descent from some deity. In the Scandinavian nations, he administered pagan sacrifices (blóts) at important cult sites, such as the Temple at Uppsala. Refusal to administer the blóts could lead to the king losing power (see Haakon the Good and Anund Gårdske). According to the testimony of Tacitus (Germania), some early Germanic peoples had an elective monarchy already in the 1st century. They choose their kings by birth, their generals for merit. These kings have not unlimited or arbitrary power, and the generals do more by example than by authority. Germanic pre-Christianization society had three levels, the king, the nobility and the free men. Their respective political influence was negotiated at the thing. According to the testimony of Tacitus, About minor matters the chiefs