The first elections to a constitutional convention took place on 16 May 1920, and the first parliamentary session on 14 June 1920 at the former West Prussian Provincial administration building (Provinzialverwaltung – Landeshaus), Neugarten (today Nowe Ogrody).
At the same time, the opposition parties were subject to a massive terror campaign; the Social Democrats were only able to organize seven rallies, only one of which was in a major hall, and all of which were disturbed by the SA, a Nazi paramilitary force.
[4][5] However the High Court did not agree to cancel the election results, but only changed them in part: the Nazi party had to give away one seat, which was then granted to the Social Democrats.
The council adjourned a decision, and after Danzig's President Arthur Greiser promised to maintain the constitution in the future, the League of Nations abandoned the petition.
A conservative member of the German National People's Party (DNVP), Curt Blavier, a former Senator and vice president of Danzig's police, was arrested.
Gustav Pietsch, an independent candidate sympathizing with the conservative DNVP, was attacked with an iron bar, pushed in front of a tram and severely injured.
On 25 May 1937 the Social Democrat politician Hans Wiechmann was killed by the Gestapo after a visit to the League of Nations' High Commissioner Carl Jacob Burckhardt.