米哈伊一世
The Kingdom of Romania () was a constitutional monarchy that existed in Romania from 13 March (O.S.) / 25 March 1881 with the crowning of prince Karl of Hohenzollern-Sigmaringen as King Carol I (thus beginning the Romanian royal family), until 1947 with the abdication of King Michael I of Romania and the Romanian parliament's proclamation of Romania as a putative socialist people's republic.