In 1457 Jan IV of Oświęcim agreed to sell the duchy to the Polish Crown, and in the accompanying document issued on 21 February the village was mentioned as Halcznow.

[4] The territory of the Duchy of Oświęcim was eventually incorporated into Poland in 1564 and formed Silesian County of Kraków Voivodeship.

The census asked people their native language, and results show that 1986 (74,4%) were German-speaking and 678 (25,4%) were Polish-speaking.

The dominant religious groups were Roman Catholics with 2652 (99,4%), 11 (0,4%) Jews and 6 persons were adherents of another religion.

It was annexed by Nazi Germany at the beginning of World War II, and afterwards it was restored to Poland.