Opole is a city located in the south-western part of Poland, and is one of the oldest cities in the country. It has a rich history, dating back to the 9th century, when it was founded by the Piast dynasty
From Wikipedia
Opole is a city located in southern Poland on the Oder River and the historical capital of Upper Silesia. With a population of approximately 127,387 as of the 2021 census, it is the capital of Opole Voivodeship (province) and the seat of Opole County. Its metropolitan area was home to 146,522 inhabitants. It is the largest city in its province.