evidence: The entire territory that corresponds to today's country is commonly referred to in English simply as Kosovo and in Albanian as Kosova (definite form) or Kosovë (indefinite form, pronounced [kɔˈsɔvə]). In Serbia, a formal distinction is made between the eastern and western areas of the country; the term Kosovo (Косово) is used for the eastern part of Kosovo centred on the historical Kosovo Field, while the western part of the territory of Kosovo is called Metohija (Albanian: Dukagjin). Thus, in Serbian the entire area of Kosovo is referred to as Kosovo and Metohija.[25] [...] During the 13th and 14th centuries, Kosovo was a political, cultural and religious centre of the Serbian Kingdom.[54] In the late 13th century, the seat of the Serbian Archbishopric was moved to Peja, and rulers centred themselves between Prizren and Skopje,[55] during which time thousands of Christian monasteries and feudal-style forts and castles were erected,[56] with Stefan Dušan using Prizren Fortress as one of his temporary courts for a time. When the Serbian Empire fragmented into a conglomeration of principalities in 1371, Kosovo became the hereditary land of the House of Branković.[54][57] During the late 14th and early 15th centuries, parts of Kosovo, the easternmost area located near Pristina, were part of the Principality of Dukagjini, which was later incorporated into an anti-Ottoman federation of all Albanian principalities, the League of Lezhë.[58]