History of Oceania

What nations or formerly independent states under one ruler is?

* Andorra: Two co-princes, the President of France and the Bishop of Urgell, Spain.

* Bahrain: A hereditary monarchy ruled by the Al Khalifa family.

* Liechtenstein: A hereditary monarchy ruled by the House of Liechtenstein.

* Monaco: A hereditary monarchy ruled by the Grimaldi family.

* San Marino: Two Captains Regent, each elected for a six-month term.

* Vatican City: An absolute monarchy led by the Pope.

Formerly independent states under one ruler:

* Austria-Hungary (1867-1918): A dual monarchy under Emperor Franz Joseph I.

* Ottoman Empire (1299-1922): A caliphate and empire ruled by the Ottoman sultans.

* Russian Empire (1721-1917): An empire ruled by the Romanov dynasty.

* German Empire (1871-1918): A monarchy under Emperor Wilhelm II.

* Qing Dynasty (1644-1912): A dynasty that ruled over China.