(1839-1914) First king of Romania 1881–1914. A prince of the house of Hohenzollern-Sigmaringen, he was invited to become prince of Romania, then part of the Ottoman Empire, 1866. In 1877, in alliance with Russia, he declared war on Turkey, and the Congress of Berlin 1878 recognized Romanian independence.
He promoted economic development and industrial reforms but failed to address rural problems. This led to a peasant rebellion 1907 which he brutally crushed. At the beginning of World War I, King Carol declared Romania's neutrality but his successor (his nephew King Ferdinand I) declared for the Allies.