Szczecin was German-speaking Stettin.for centuries until annexed to the German Reich by Hitler, later taken "back" by Poland and re-named Szczecin
It never hurts to educate yourself. Therefore...
Szczecin was founded by the Slavic tribe of Wkrzanie at the turn of the 7th and 8th centuries on what is now Castle Hill. Initially, it was a typical settlement of farmers and livestock breeders; however, with the development of trade and crafts, it was transformed into a fortified stronghold. Later, Szczecin and surrounding Slavic areas were formally incorporated into Poland in 1121, and its inhabitants were converted to Christianity. Szczecin was a part of Księstwo Pomorskie and received city rights in 1243. German population started dominate in the city only in late Middle Ages. So it was Slavic/Polish since its foundation for about 700 years, then for about 450 years mostly German and since 1945 Polish again (80 years now). So we get about 800 years of Slavic/Polish history and 450 years Germanic.
And that's Szczecin - the westernmost part of Poland today. Everything further east is even more Slavic/Polish in heritage. Not to mention that Polabian Slavs (Wends) and other Slavic tribes had their ancesteral lands extending all the way to Elbe river...

... Crow would of course tell you some kind of nonsense about them being Serbs, but they were basically proto-Poles.
So, if one day Poland went full-retard and started a Special Military Operation to regain all ancient Polish lands and restore
Polski Mir, then practically all of former DDR would have to come back to their Polish fatherland. Lub
in, Szczec
in, Koszal
in, Gub
in, Radz
in, Barc
in and - yes - Berl
in. All Polish cities and towns.
Of course, Polish SMO will never happen because we are a civilised modern European nation. However, Lyzko, don't be a retard and never deny the Polishness of all the lands all the way to Elbe River.