#dual monarchy
- Austro-Hungarian — Pertaining to Austria-Hungary, the former dual monarchy created by the political constitutional compromise between the Austrian Empire and the Kingdom of Hungary, existing from 1867 to 1918. It describes the administrative institutions, military, and territories of this empire.
- Austria-Hungary — A multinational imperial state and dual monarchy in Central Europe that existed from 1867 to 1918, established following the constitutional compromise between the Austrian Empire and the Kingdom of Hungary under the House of Habsburg-Lorraine. Characterized by a unique administrative structure with two capitals (Vienna and Budapesta), vast ethnic diversity, and major geopolitical influence, it dissolved at the end of World War I.