Many countries have lost their historical capitals. How did they lose them?

Although most countries have experienced ups and downs, there is at least one guarantee: they will not lose their historical capitals.
In the history of
, there is a classic saying: "from ancient times to the present, there has never been a country that will not die, and there are also tombs that cannot be dug up." The so-called rise and fall, honor and disgrace, the normality of the world, is acceptable to everyone.
the capital may also have ill-gotten gains
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