EN
This paper is the result of research conducted over several years on four Polish political parties: Civic Platform (Platforma Obywatelska ‘PO’); Law and Justice (Prawo i Sprawiedliwość ‘PiS’); Democratic Left Alliance (Sojusz Lewicy Demokratycznej ‘SLD’); and the Polish People’s Party (Polskie Stronnictwo Ludowe ‘PSL’). The purpose of the research was to determine whether the processes occurring within these parties as a result of Europeanization are substantial and affect their values, internal culture and organisational model. The intensity of each parties’ Europeanization was analysed in three dimensions: structure and organisation, political agendas, and culture. The research encompassed a period of ten years, spanning from before Poland’s accession to the EU to the most recent years.