 Devoid of their original hosts, many synagogue buildings house libraries and smaller museums as in Kraków, Łańcut, Włodawa, Tykocin, Zamość, Radzanów, but many more serve as apartment buildings, shops, gyms and whatever else community needs require.This isn't bad however, because the synagogues which remain empty are usually worse off due to lack of maintenance.The Union of Jewish Religious Communities in Poland (ZGWŻ) with branches in nine metropolitan centres helps the descendants of the Holocaust survivors in the process of recovery and restoration of synagogue buildings once owned by the Jewish Kehilla (קהלה), and nationalized in Communist Poland.