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The second part of the article deals with heretofore unknown descriptions of the southern border of the court district of Pisz, part of the military district of Balgij (temporarily Rynsk), which started on the river Boleszówka, a tributary of the Turosl (Rudna) and then ran eastward along the Kolno Upland. This fragment of the frontier between Mazovia and the Teutonic Order, all the way to the headspring...
The formation of the Mazovian-Teutonic Order boundary has not been sufficiently examined up to now. This is the prime reason why Polish and German writings feature numerous contradictory findings or erroneous simplifications, including those concerning the circumstances and course of the Rajgród–related conflict between Mazovia (Poland) and the Teutonic Knights (summer 1360), described in a copious...
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