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| Kingdom of Prussia Königreich Preußen | |
|---|---|
.svg.png) State flag (1803–1892)
 Coat of arms
| |
 Kingdom of Prussia in 1815 | |
| Capital | Berlin Königsberg (1806-07) |
| Demonym(s) | Prussian |
| Government | Absolute Monarchy |
The Kingdom of Prussia was a North German state within the Holy Roman Empire and later the German Confederation. It was one of the largest states in pre-unified Germany and was a driving force behind the unification of Germany into the German Empire.