Pages in this category should be moved to subcategories where applicable. This category may require frequent maintenance to avoid becoming too large. It should directly contain very few, if any, pages and should mainly contain subcategories.

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Prior to 1809, what then became the autonomous Russian Grand Duchy of Finland had been an integrated part of Sweden (a.k.a. Sweden-Finland) more or less since the dawn of history in Scandinavia, i.e., since Christianization. Therefore, much of Finland's history prior to 1809 is covered in articles in Category:History of Sweden. However, articles about local history in Finland are in Category:Finland under Swedish rule.