Which of the following best describes the most important aspects of Charlemagne’s rule?

The most important aspects of Charlemagne's rule can be described as follows:

1. Expansion of the Frankish Kingdom: Charlemagne significantly expanded the Frankish Kingdom, conquering vast territories. He incorporated Lombardy, Saxony, Bavaria, and other regions into his empire, effectively establishing the foundations of what would become the Holy Roman Empire.

2. Political Reforms: Charlemagne implemented a series of political reforms to centralize his empire. He appointed trusted officials called counts to govern various regions, established a capital in Aachen, and introduced a system of royal Missi Dominici (envoys of the lord king) to ensure efficient governance and communication across the realm.

3. Cultural Revival: Charlemagne played a crucial role in the Carolingian Renaissance, actively promoting education and cultural revival in his empire. He established schools and encouraged the production of manuscripts, resulting in the preservation and dissemination of classical texts and ideas.

4. Religious Influence: Charlemagne was a devout Christian and sought to spread Christianity throughout his empire, often using military force. He waged wars against pagan tribes and forced conversions, aiming to unite all his subjects under the Christian faith.

5. Administrative Reforms: Charlemagne implemented administrative reforms to improve governance and supervision within his empire. He standardized coinage, introduced a uniform system of weights and measures, and compiled legal codes, such as the Capitulary of Herstal, to ensure a consistent rule of law.

6. Charlemagne as Emperor: In 800, Charlemagne was crowned emperor by Pope Leo III, reviving the title of the Roman Emperor in the West. This act solidified his authority, strengthened his relationship with the Church, and elevated his status on the European stage.

Overall, the most important aspects of Charlemagne's rule can be summarized as expansion, political and administrative reforms, cultural revival, religious influence, and his imperial title as the Emperor of the Holy Roman Empire.