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Aurochs, the primitive prehistoric cattle of Europe, had lived in Poland? [48]
Re the aurochs it would seem then that that they have been extinct throughout Europe,
In most of Europe they became extinct in 10th-14th century, the last ones lived in Poland, in Mazovia, since 15th century they were under protection of Mazovia's prince and later of Polish king, their last major habitat was even turned into a kind of national park, however the population was already very small, it was decimated by diseases transmitted by domestic cattle, the last one died in 1627.
Some kinds of domestic cattle are quite closely related to aurochs. Germans and Dutch have been trying to bring it back by breeding the ones that resamble aurochs the most, however it's not a real auroch.
en.wikipedia.org/wiki/Aurochs#Breeding_of_aurochs-like_cattle
en.wikipedia.org/wiki/Heck_cattle