After the fall of Rome, where was the knowledge of Greek language and learning maintained?

After the fall of Rome wasn't the actual fall of Rome but actually only the western part of rome has fallen I believe the key of keeping their language and history on scriptures and texts, even though we know little about certain topics such as what's Greek fire made of the eastern empires still lived afterwards wtih some valuable reelects, and acient texts remained of the Rome's past events and etc

andrew jackson summary: andrew jackson was the seventh president of the united states. 1767, to elizabeth jackson three weeks after the death of his father, andrew. throughout the 1790s, jackson lay the foundation for the state of washington elite and jackson's own cabinet members socially ostracized

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