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I've been reading up on the Middle Ages, which is an area of little expertise for me. Recently, I discovered the Kingdom of Germany on Wikipedia; however, I am a bit confused on the topic, which is why I have come to you, AH.com, to answer my questions. Here are said questions:

-Was the Kingdom of Germany a politically centrallized entity, or could it have the potential to become one (a la France)?

-What was the relation between the Kingdom of Germany and the Holy Roman Empire?

-When and why did the Kingdom of Germany cease to exist as a political entity?

I am totally clueless on the Middle Ages and how they worked, so if anyone would help clarify things for me, that would be great. Thanks in advance!
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