What is considered to be the center of the feudal economy and political structure?

In the center of everything was the manorial system, which shaped how everything was functioning in the Middle Ages.

Explanation:

In this system, a ruler (senior) was giving land to his vassals, whose obligation was to gather the army when necessary and also to collect money from the manors. At the bottom of the hierarchy were peasants, who practically had no rights, although were doing all the hard work.

it was the first amendment

adopted the practice of proskynesis, a persian court custom that involved bowing down and kissing the hand of others, depending on their rank.