Sectionalism describes the strong divide that was created between the north and south and led citizens to be loyal to the region in which they lived.
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This is a very difficult question and one that is heavily debated today, but the general consensus is that although feudalism was initially helpful at protecting the unprotected in society, it overall held Europe back from economic and social development since there was no upward mobility.
The purpose was to make the economy and the military stronger, to do that, banks needed to be built, so, if the money was flowing was, that meant the economy was good, and more money was coming to the government. They can use that to strengthen the country defenses.
It served as a center of religious, political, and artistic life for the Byzantine world and has provided us with many useful scholarly insights into the period. It was also an important site of Muslim worship after Sultan Mehmed II conquered Constantinople in 1453 and designated the structure a mosque. Since its origins in the sixth century A.D, the Hagia Sophia has served as a church, a mosque, and, since 1934, a museum. But on July 10, the Turkish government declared that from now on it would serve as a mosque and be open for all visitors when not in use for the five daily prayers.
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