Don't know much about this, but what about the part of Poland stolen by Russia after big 2?
Dismemberment of Poland
Under the terms of two decrees by Hitler (8 October and 12 October 1939), large areas of western Poland were annexed to Germany. These included all the territories which Germany had lost under the 1918 Treaty of Versailles, such the Polish Corridor, West Prussia and Upper Silesia, but also a large area of indisputably Polish territory east of these territories, including the city of Lodz.
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The area of these annexed territories was 94,000 square kilometres and the population was about 10 million, the great majority of whom were Poles.
Under the terms of the Nazi-Soviet pact, adjusted by agreement on 28 September 1939, the Soviet Union, annexed all Polish territory east of the line of the rivers Pisa, Narew, Bug and San, except for the area around Wilno (Vilnius), which was given to Lithuania, and the Suwalki region, which was annexed by Germany. These territories were largely inhabited by Ukrainians and Byelorussians, with minorities of Poles and Jews. The total area, including the area given to Lithuania, was 201,000 square kilometres, with a population of 13.5 million. A small strip of land that was part of Hungary before 1914, was also given to Slovakia.
http://united-states.asinah.net/american-encyclopedia/wikipedia/h/hi/history_of_poland__1939_1945_.html
It was more or less the deal : Russian borders were moves farther west, and to compensate the loss of territory Polish borders were also moved farther west, in some regions that never were part of Poland IIRC.
As for the old Hanseatic city of KÖnigsberg, the Russians made it and the surrounding region a Russian enclave. When the Baltic States finally wresteled their independance from Moscow, the enclave remained, totally isolated from other Russian territory. It stays like this nowadays.