"Carol I (20 April 1839 – 27 September (O.S.) / 10 October (N.S.) 1914), born Prince Karl of Hohenzollern-Sigmaringen, was the monarch of Romania from 1866 ...
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to 1914. He was elected Ruling Prince (Domnitor) of the Romanian United Principalities on 20 April 1866 after the overthrow of Alexandru Ioan Cuza by a palace coup d´état. In May 1877, he proclaimed Romania an independent and sovereign nation. The defeat of the Ottoman Empire (1878) in the Russo-Turkish War secured Romanian independence, and he was proclaimed King of Romania on 26 March [O.S. 14 March] 1881. He was the first ruler of the Hohenzollern-Sigmaringen dynasty, which ruled the country until the proclamation of a republic in 1947." - (en.wikipedia.org 31.01.2020)