|Federal Republic of Threussia|
|Recognised regional languages||Polish|
|41,300 km2 (15,900 sq mi)|
Threussia, officially the Federal Republic of Threussia (Threussian: Vūndsfrærike Þreußa), is a federal presidential republic located in Eastern Europe. It borders Lithuania to the northeast and Poland to the south and west. To the north lies the Baltic Sea, where it shared maritime borders with the Kalmar Union. The capital is Gūngsburg and the largest city is is Tanszig.