In Freethinkers Hall, which before the Nazi resurgence was the national headquarters of the German Freethinkers League, the Berlin Protestant church authorities have opened a bureau for advice to the public in church matters. Its chief object is to win back former churchgoers and assist those who have not previously belonged to any religious congregation in obtaining church membership. The German Freethinkers League, which was swept away by the national revolution, was the largest of such organizations in Germany. It had about 500,000 members.