What two leadership roles did the pope play in medieval Europe?

The Pope's role in the Medieval society is to represent the

spiritual authority of the Church and, later, the state authority,

which was normally represented by a King or Emperor, but was  

changed with the argument titled the 'Doctrine of Swords', which

claimed that the Pope had authority over both the church and

the state.

The Heian period (平安時代, Heian jidai) is the last division of classical Japanese history, running from 794 to 1185.[1] The period is named after the capital city of Heian-kyō, or modern Kyoto. It is the period in Japanese history when Buddhism, Daoism and other Chinese influences were at their height. The Heian period is also considered the peak of the Japanese imperial court and noted for its art, especially poetry and literature. Although the Imperial House of Japan had power on the surface, the real power was in the hands of the Fujiwara clan, a powerful aristocratic family who had intermarried with the imperial family. Many emperors actually had mothers from the Fujiwara family.[2] Heian (平安)