The Judge/prophet Samuel anointed Saul as the first king of Israel. Saul was succeeded by David and then by Solomon. Under Solomon, Israel was a strongly united nation whose territory had been expanded by David.
The United Kingdom lasted 120 years before being divided into the northern kingdom of Israel and the southern kingdom of Judah. Similarly, Pope Leo III crowned Charlemagne of the Franks in 800 A.D. and named his kingdom the Holy Roman Empire.
This was the first time a pope had crowned a king. Charlemagne then established a united Christian empire based upon the ideal of Augustine's The City of God. Charlemagne's empire also occupied a vast territory.
This united Christian empire endured for nearly 120 years before it was similarly divided between the East and West Franks.
Young Oon Kim