Prussian Landtag elections in the Weimar Republic
The Free State of Prussia held a series of democratic parliamentary elections to its Landtag between 1919 and 1933. As the largest German state by population and territory, Prussia played a pivotal role in shaping national politics during the Weimar era.
Source: Wikipedia — Prussian Landtag elections in the Weimar Republic (CC BY-SA 4.0)