Leszek II the Black
The first mention of the town, which names Krosno as one of 34 estates in Lesser Poland granted to the Bishopric of Lubusz, appears in a document signed by High Duke of Poland Leszek II the Black in 1282. However, the oldest traces of settlement in the fork of the Wisłok and Lubatówka Rivers, found during archaeological research, date back to the 10th and 11th centuries. The area was inhabited by the old Polish tribe of Lendians.