Title: Charlemagne
Content: Louis received Aquitaine, the Spanish March and Provence. The imperial title was not mentioned, which led to the suggestion that, at that particular time, Charlemagne regarded the title as an honorary achievement that held no hereditary significance. Pepin died in 810 and Charles in 811. Charlemagne then reconsidered the matter, and in 813, crowned his youngest son, Louis, co-emperor and co-King of the Franks, granting him a half-share of the empire and the rest upon Charlemagne's own death. The only part of the Empire that Louis was not promised was Italy, which Charlemagne specifically bestowed upon Pippin's illegitimate son Bernard.

Title: Louis the Pious
Content: the Younger, King of Neustria, and Pepin, King of Italy. In the "Divisio Regnorum" of 806, Charlemagne had slated Charles the Younger as his successor as emperor and chief king, ruling over the Frankish heartland of Neustria and Austrasia, while giving Pepin the Iron Crown of Lombardy, which Charlemagne possessed by conquest. To Louis's kingdom of Aquitaine, he added Septimania, Provence, and part of Burgundy. However, Charlemagne's other legitimate sons died – Pepin in 810 and Charles in 811 – and Louis alone remained to be crowned co-emperor with Charlemagne in 813. On his father's death in 814, he inherited

Title: Succession to the French throne
Content: Lombardy, which Charlemagne possessed by conquest. To Louis's kingdom of Aquitaine, he added Septimania, Provence, and part of Burgundy. But Charlemagne's other legitimate sons died – Pepin in 810 and Charles in 811 – and Louis alone remained to be crowned co-emperor with Charlemagne in 813. Pepin, King of Italy, left behind a son, Bernard. On the death of Charlemagne in 814, Louis inherited the entire Frankish kingdom and all its possessions (the concept of successional representation was not yet well-established). But Bernard was allowed to retain control of Italy, the sub-kingdom of his father. Following the death of Louis

Title: History of France
Content: by Pepin the Short (son of Charles Martel) established the Carolingian dynasty as the Kings of the Franks. Carolingian power reached its fullest extent under Pepin's son, Charlemagne. In 771, Charlemagne reunited the Frankish domains after a further period of division, subsequently conquering the Lombards under Desiderius in what is now northern Italy (774), incorporating Bavaria (788) into his realm, defeating the Avars of the Danubian plain (796), advancing the frontier with Islamic Spain as far south as Barcelona (801), and subjugating Lower Saxony after a prolonged campaign (804). In recognition of his successes and his political support for the

Title: Middle Ages
Content: Italy, and his imperial title was recognised. Louis the German was in control of Bavaria and the eastern lands in modern-day Germany. Charles the Bald received the western Frankish lands, comprising most of modern-day France. Charlemagne's grandsons and great-grandsons divided their kingdoms between their descendants, eventually causing all internal cohesion to be lost. In 987 the Carolingian dynasty was replaced in the western lands, with the crowning of Hugh Capet (r. 987–996) as king. In the eastern lands the dynasty had died out earlier, in 911, with the death of Louis the Child, and the selection of the unrelated Conrad

Question: What title did Charlemagne, already king of the Franks, acquire in 800?
Answer: Holy Roman Emperor