Information: - The Holy Roman Emperor (historically "" "Emperor of the Romans") was the ruler of the Holy Roman Empire. From an autocracy in Carolingian times the title evolved into an elected monarchy chosen by the Prince-electors. Until the Reformation the Emperor elect ("imperator electus") was required to be crowned by the Pope before assuming the imperial title. - Louis the Pious ( 778 -- 20 June 840 ) , also called the Fair , and the Debonaire , was the King of Aquitaine from 781 . He was also King of the Franks and co-Emperor ( as Louis I ) with his father , Charlemagne , of the Holy Roman Empire from 813 . As the only surviving adult son of Charlemagne and Hildegard , he became the sole ruler of the Franks after his father 's death in 814 , a position which he held until his death , save for the period 833 -- 34 , during which he was deposed . During his reign in Aquitaine , Louis was charged with the defence of the empire 's southwestern frontier . He conquered Barcelona from the Muslims in 801 and asserted Frankish authority over Pamplona and the Basques south of the Pyrenees in 812 . As emperor he included his adult sons , Lothair , Pepin , and Louis , in the government and sought to establish a suitable division of the realm among them . The first decade of his reign was characterised by several tragedies and embarrassments , notably the brutal treatment of his nephew Bernard of Italy , for which Louis atoned in a public act of self - debasement . In the 830s his empire was torn by civil war between his sons , only exacerbated by Louis 's attempts to include his son Charles by his second wife in the succession plans . Though his reign ended on a high note , with order largely restored to his empire , it was followed by three years of civil war . Louis is generally compared unfavourably to his father , though the problems he faced were of a distinctly different sort . - Charlemagne (2 April 742/747/74828 January 814), also known as Charles the Great or Charles I, was King of the Franks. He united much of Europe during the early Middle Ages and laid the foundations for modern France, Germany and the Low Countries. He took the Frankish throne in 768 and became King of Italy in 774. From 800, he served as the first Holy Roman Emperorthe first recognised emperor in Western Europe since the fall of the Western Roman Empire three centuries earlier. - Aquitaine ( Poitevin-Saintongeais : "Aguiene"), archaic "Guyenne"/"Guienne" (Occitan: "Guiana") was a traditional region of France, and was an administrative region of France until 1 January 2016. It is now part of the new region Nouvelle-Aquitaine. It is situated in the south-western part of Metropolitan France, along the Atlantic Ocean and the Pyrenees mountain range on the border with Spain. It is composed of the five departments of Dordogne, Lot-et-Garonne, Pyrenees-Atlantiques, Landes and Gironde. In the Middle Ages, Aquitaine was a kingdom and a duchy, whose boundaries fluctuated considerably. - In historiography, the Western Roman Empire consists of the western provinces of the Roman Empire at any one time during which they were administered by a separate independent Imperial court, coequal with (or only nominally subordinate to) that administering the eastern half. Both "Western Roman Empire" and "Eastern Roman Empire" (or "Byzantine Empire") are modern terms describing "de facto" independent entities; however, at no point did Romans consider the Empire split into two, but rather considered it a single state governed by two separate Imperial courts out of administrative expediency. The view that the Empire was impossible to govern by one emperor was established by Diocletian following the disastrous civil wars and disintegration of the Crisis of the 3rd century, and was instituted in Roman law by his introduction of the Tetrarchy in AD 285, a form of government which was legally to endure in one form or another for centuries. The Western Court was periodically abolished and recreated for the next two centuries until final abolition by the Emperor Zeno in 480, by which time there was little effective central control left in the area legally administered by the Western Court. - The Franks (or ') are historically first known as a group of Germanic tribes that inhabited the land between the Lower and Middle Rhine in the 3rd century AD, and second as the people of Gaul who merged with the Gallo-Roman populations during succeeding centuries, passing on their name to modern-day France and becoming part of the heritage of the modern French people. Some Franks raided Roman territory, while other Frankish tribes joined the Roman troops of Gaul. In later times, Franks became the military rulers of the northern part of Roman Gaul. With the coronation of their ruler Charlemagne as ' by Pope Leo III in 800 AD, he and his successors were recognised as legitimate successors to the emperors of the Western Roman Empire. - The Roman Empire (Koine and Medieval Greek: , tr. ) was the post-Roman Republic period of the ancient Roman civilization, characterized by government headed by emperors and large territorial holdings around the Mediterranean Sea in Europe, Africa and Asia. The city of Rome was the largest city in the world BC AD, with Constantinople (New Rome) becoming the largest around 500 AD, and the Empire's populace grew to an estimated 50 to 90million inhabitants (roughly 20% of the world's population at the time). The 500-year-old republic which preceded it was severely destabilized in a series of civil wars and political conflict, during which Julius Caesar was appointed as perpetual dictator and then assassinated in 44 BC. Civil wars and executions continued, culminating in the victory of Octavian, Caesar's adopted son, over Mark Antony and Cleopatra at the Battle of Actium in 31 BC and the annexation of Egypt. Octavian's power was then unassailable and in 27 BC the Roman Senate formally granted him overarching power and the new title "Augustus", effectively marking the end of the Roman Republic. - Spain, officially the Kingdom of Spain, is a sovereign state largely located on the Iberian Peninsula in southwestern Europe, with two large archipelagos, the Balearic Islands in the Mediterranean Sea and the Canary Islands off the North African Atlantic coast, two cities Ceuta and Melilla in the North African mainland and several small islands in the Alboran Sea near the Moroccan coast. Its mainland is bordered to the south and east by the Mediterranean Sea except for a small land boundary with Gibraltar; to the north and northeast by France, Andorra, and the Bay of Biscay; and to the west and northwest by Portugal and the Atlantic Ocean. It is the only European country to have a border with an African country (Morocco) and its African territory accounts for nearly 5% of its population, mostly in the Canary Islands but also in Ceuta and Melilla. - The Fall of the Western Roman Empire (also called Fall of the Roman Empire or Fall of Rome) was the process of decline in the Western Roman Empire in which it failed to enforce its rule, and its vast territory was divided into several successor polities. The Roman Empire lost the strengths that had allowed it to exercise effective control; modern historians mention factors including the effectiveness and numbers of the army, the health and numbers of the Roman population, the strength of the economy, the competence of the Emperor, the religious changes of the period, and the efficiency of the civil administration. Increasing pressure from "barbarians" outside Roman culture also contributed greatly to the collapse. The reasons for the collapse are major subjects of the historiography of the ancient world and they inform much modern discourse on state failure. Given the information, choose the subject and object entities that have the relation of 'position held'.
louis the pious , holy roman emperor