Otto I, known colloquially through the epiphet Otto the Great, was originally the Duke of Saxony and King of Germany in 936 and considered by some historians to have been the 1st Holy Roman Emperor, reigning from 962 to 973. He is known well for sustaining the efforts of his father Henry the Fowler in unifying all German tribes into a single state under the monarchy. By doing this, he had greatly expanded on the powers of the king, leading him to take on large reforms, such as the transformation of the Roman Catholic Church and its clergy to be under monarchical control. Throughout his reign as King of Germany, he had dealt with Hungarian invasions in the Battle of Lechfeld in 955, successfully putting an end to these invasions and thus became highly respected by the Christian world as a result. After conquering the Kingdom of Italy in 961, the territories he owned flourished under the Ottonian dynasty as patrons to art and architecture. During this period, he was eventually crowned as Holy Roman Emperor by Pope John the XII, ruling for 11 years until his death on May 973.
To gain more insight on what Otto's socionics type is, it would be best to look at his life before his coronation as German King and Holy Roman Emperor. Of his four siblings, Otto I was considered the most courageous and fearless of his kin and was appointed as a military commander when he became an adult. His contemporaries compared his tremendous physical strength to that of a lion, learning all the art of war tactics very quickly in his youth. As military commander, his first military victory resulted after campaigning Slavic Invasions of the Germanic Kingdom in 929, resulting in the ensured protection of his father's kingdom and arranged marriage for Otto to improve relations with Anglo-Saxon England. Once Otto was married to Edith of England in 930, Otto continued his efforts of watching over the German army as a cautious administrator who understood how to keep his troops in line and the importance of adequately using his position as royal authority to his advantage. This already points to strong and valued F, likely as in the Ego Block.
Six years after Otto's marriage, his father Henry died on July 936 and he assumed the throne as the next in line on August 936. The new Duke of Bavaria, Eberhard quickly came into conflict with Otto, greatly opposing the sovereignty of the German king over Bavaria, Eberhard disregarded the peace treaty already in place and decided to rebel against the king. In two graceful and swift military campaigns in 938, Otto exiled Eberhard after his defeat, stripped him of his titles and ensured that his actions would be met with equal and necessary punishment. Even after this victory, Eberhard was already plotting another rebellion in his exile and gained the support of Otto's brother Henry to claim the throne for himself. After hearing about this, Otto exiled his own brother and began to ally with supporters like Hugh the Great to track down the rebellion. Unfortunately, the armed forces could not track down the leaders of the rebellion, despite the first few victories that Otto had against the rebels. Archbishop Frederick even intervened and wanted to mediate peace between belligerents, but Otto ignored this qualm for peace, allied with the Duchy of Swabia and Alsace to eliminate the rebellion entirely and kill Eberhard. After claiming yet another victory for Germany, he divided the Duchy of Franconia into smaller counties that were more manageable from an administrative perspective. What can be said about the evidence available, is that Otto the I was very much an omnicompetent ruler who had great political awareness in what they did in terms of war, maintaining their power, and administration. His focus between his reign in 941 and 951 was on restructuring the government and consolidating his power; increasing centralisation in the monarchy. This approach indicates stronger L blocked with F, rather than R, which would result in the L1+F2 rigidity of the rules he created and the flexibility of using force when L let him down.
Otto had dealt with previous issues right before restructuring governmental powers, for instance, Louis IV had asserted himself yet a second time to rule Lorraine independently in 940, which was based on his claim to be Duke of Lorraine due to his marriage to Gerberga of Saxony, Otto's sister. Otto thought this claim to be unworthy of his attention and instead appointed his brother Henry as Duke of Lorraine, not because he personally trusted him as family, but because he thought he was could perform the job of managing a Duchy better than Louis IV. Hugh was to perform an act of submission to Louis IV, and in return Louis IV was to waive any claims to Lorraine. This pattern of mediating conflicts that he thought would ruin the royal marriage and effort to repair relations with France. Burgundy, Bohemia and the Byzantine empire does show that Otto cared enough about R to use it for his own reasons, but didn't really care much for Henry or Gerberge as individuals and seldom got to know them personally outside of political relations. This points to weak and unvalued R, though not completely distended as R4, making R3 the most likely possibility.
However, during his rule as Holy Roman Emperor, Otto frequently encountered complications that threatened his position has emperor and dealt with these situations in a peculiar way. To clarify, Pope John XII eventually turned against Otto because of his increasing political power, so he arranged to have his ownership of the papacy revoked. Otto immediately realized this and quickly imposed the rule that no pope could be elected without the emperor's approval. This proclamation opened an era of German domination of the papacy and resulted in Otto to remain as head of the Christian community for the rest of his reign.
To gain a better understanding surrounding his ability in R, it would be best to look at those who personally knew him. However, since accounts of such people are very limited, the The Catholic Encyclopedia described him fluently as:
"His contemporaries compared his tremendous physical strength to that of a lion. He was a Saxon through and through. In his youth he had learned all the arts of the profession of arms. Though subject to violent fits of temper, and conscious of his power and genius, he prayed devoutly as a child. A shrewd calculator, always convincing and always toiling, he correctly estimated the importance of diplomatic negotiations. He was a keen observer and possessed a fine knowledge of human nature which always enabled him to select the proper persons for important offices in the government." - Kampers, Franz. "Otto I, the Great."
From that, moving onto Otto's coronation as Holy Roman Emperor would further bring more insight as to what type Otto I would be. With Clarity-Seeking and World-Rejecting values, that already puts Otto the Great squarely in the Beta quadra. Later in life, the new Holy Roman Emperor of the Ottonian dynasty had put forth projects or a "limited renaissance" as it's often called in history.
Otto I's Imperial coronation had a massive effect on German culture and arts, in that it created a renewed faith in the Holy Roman Empire and reformed the Catholic church. This immediately resulted in a period of profound development in "Ottonian art" as they called it, or art by the court to confirm his Holy and Imperial lineage through associations with Constantine the Great (EIE) and Justinian I (EIE). Otto I relished in this atmosphere and felt great admiration towards the people who respected him in this way and allowed the arts to thrive in a way that best fit the vision of the future kingdom. The truth is that Otto I didn't participate in these arts, it was created for him to appreciate, which he did. From what the information available suggests, is that there wasn't much E at all coming from Otto himself, but he greatly appreciated the efforts of German artists to paint an image for him as this magnanimous emperor, which fits weak and valued E5. In addition, later in life, Otto became more interested in more artistic and architectural projects that gave him a chance to improve the aesthetic value of the Empire, with great emphasis on the organization of such projects and to take part in leisure only when his duties were fulfilled. This would be a unusual for a Beta type like the EIE or SLE with S as a vulnerable or ignoring function, Otto's approach to this would seem to fit a type with quite strong S, likely that of the LSI's S8 rather than the IEI's S3.
Otto's general focus is on the present moment, yet persistently carrying on with his own mission of continuing what his father started for the glory and future prosperity of the Holy Roman Empire does suggest T6. His T was considerably weaker compared to what he was like later in life, in his youth, his campaigns relied on more direct tactics rather than much forethought or strategic planning (Whether it was luck or his own shrewdness on the battlefield is left up to debate).
The overall evidence thus far points to LSI as the most likely type for Otto I, with arguments addressing L1, F2, R3, E5, T6 and S8. A magnanimous, yet paranoid emperor who stuck to his "vision" of how the empire should be, managed the state well and centralized power to the monarchy to carry out these projects.
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