Relation: ‪Księstwo Polskie (973 - 981)‬ (‪2744157‬)

Relation: Księstwo Polskie (973 - 981) (2744157)

Started mapping borders of Duchy of Poland (973-981) - east II

boundary	administrative
end_date	0981
name	Księstwo Polskie (973 - 981)
source	https://upload.wikimedia.org/wikipedia/commons/c/c8/Polska_960_-_992.png
start_date	0973
type	boundary

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