Transleithania
Transleithania (German: Transleithanien) was the name of the Hungarian part of Austria-Hungary, the Dual monarchy created in 1867 and dissolved in 1918. The Transleithanian lands continued to constitute the lands of the Crown of St. Stephen.
The Latin name Transleithania derives from the Leitha river- most of its territory lay east (or ""beyond" the river, from an Austrian perspective) of it. Cisleithania, the lands of the Austrian Empire in the Dual Monarchy, lay to the west of the Leitha river.
Transleithania consisted of the Kingdom of Hungary (Magyar Királyság) including Transylvania (Erdély), as well as Croatia (Horvát Királyság), Slavonia (Szlavónia), and the free port of Rijeka (Fiume).