Their citizens' rights were also limited by the German state.[13] In response to these policies, the Polish formed their own organizations to defend their interests and ethnic identity. The Sokół sports clubs and the workers' union Zjednoczenie Zawodowe Polskie (ZZP), Wiarus Polski (press) and Bank Robotników were among the best known such organizations in the area. At first the Polish workers, ostracised by their German counterparts, had supported the Catholic Centre Party.