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The Kingdom of Serbia, or the Serbian Kingdom, was a medieval Serbian kingdom in Southern Europe comprising most of what is today Serbia, Kosovo, and Montenegro, as well as southeastern Bosnia and Herzegovina, parts of coastal Croatia south of the Neretva river, Albania north of the Drin River, North Macedonia, and a small part of western Bulgaria. The medieval Kingdom of Serbia existed from 1217 to 1346 and was ruled by the Nemanjić dynasty. The Grand Principality of Serbia was elevated with the regal coronation of Stefan Nemanjić as king, after the reunification of Serbian lands. In 1219, Serbian Orthodox Church was reorganized as an autocephalous archbishopric, headed by Saint Sava. The kingdom was proclaimed an empire in 1346, but kingship was not abolished as an institution, since the title of a king was used as an official designation for a co-ruler of the emperor.