Atheism and irreligion is uncommon in Poland with Catholic Christianity as the largest faith. However, it is on the rise, which has caused tensions in the country. According to a 2020 CBOS survey, non-believers make up 9% of Poland's population. In a public performance during the 2014 Procession of Atheists in Poland commemorated Kazimierz Łyszczyński, who is considered the first Polish atheist.