Holy Roman EmpireEuropean Empire centred on Germany (10th-19th centuries), which echoed the Empire of ancient Rome. It was founded (962) when the German king Otto I (the Great) was crowned in Rome, although some historians date it from the coronation of Charlemagne in 800. The Emperor, elected by the German Princes, claimed to be the temporal sovereign of Christendom, ruling in cooperation with the spiritual sovereign, the Pope. However, the Empire never encompassed all of western Christendom, and relations with the papacy were often difficult. From 1438, the title was virtually hereditary in the Habsburg dynasty. After 1648, the Empire became little more than a loose confederation. Napoleon I finally abolished the Holy Roman Empire in 1806.