Gregorian calendarThe Gregorian calendar is the calendar used in most parts of the world. It went into effect in October 1582 following the papal bull Inter gravissimas issued by Pope Gregory XIII, which introduced it as a modification of, and replacement for, the Julian calendar. The principal change was to space leap years differently so as to make the average calendar year 365.2425 days long, more closely approximating the 365.2422-day 'tropical' or 'solar' year that is determined by the Earth's revolution around the Sun.
Alexander I of YugoslaviaAlexander I (Александар I Карађорђевић, aleksǎːndar př̩ʋiː karad͡ʑǒːrd͡ʑeʋit͡ɕ; – 9 October 1934), also known as Alexander the Unifier, was King of the Serbs, Croats and Slovenes from 16 August 1921 to 3 October 1929 and King of Yugoslavia from 3 October 1929 until his assassination in 1934. His reign of 13 years is the longest of any monarch of the Kingdom of Yugoslavia. Born in Cetinje, Montenegro, Alexander was the second son of Peter and Zorka Karađorđević.
Gračanica MonasteryThe Gračanica Monastery (Manastir Gračanica, ɡratʃǎnitsa; Manastiri i Graçanicës) is a Serbian Orthodox monastery located in Kosovo. It was built by the Serbian king Stefan Milutin in 1321. The monastery was declared a Monument of Culture of Exceptional Importance in 1990, and on 13 July 2006 it was placed on UNESCO's World Heritage List under the name of Medieval Monuments in Kosovo as an extension of the Visoki Dečani site, which was overall placed on the List of World Heritage in Danger.
Mehmed IIMehmed II (محمد ثانى; II. Mehmed, icinˈdʒi ˈmehmed; 30 March 1432 - 3 May 1481), commonly known as Mehmed the Conqueror (Ebū'l-fetḥ; Fâtih Sultan Mehmed), was an Ottoman sultan who ruled from August 1444 to September 1446 and then later from February 1451 to May 1481. In Mehmed II's first reign, he defeated the crusade led by John Hunyadi after the Hungarian incursions into his country broke the conditions of the truce per the Treaties of Edirne and Szeged.
AlbaniansThe Albanians (ælˈbɛɪniənz; Shqiptarët ʃcipˈtaɾət) are an ethnic group native to the Balkan Peninsula who share a common Albanian ancestry, culture, history and language. They primarily live in Albania, Kosovo, North Macedonia, Montenegro, Serbia as well as in Croatia, Greece, Italy and Turkey. They also constitute a large diaspora with several communities established across Europe, the Americas and Oceania. Albanians have Paleo-Balkanic origins.
Serbian nationalismSerbian nationalism asserts that Serbs are a nation and promotes the cultural and political unity of Serbs. It is an ethnic nationalism, originally arising in the context of the general rise of nationalism in the Balkans under Ottoman rule, under the influence of Serbian linguist Vuk Stefanović Karadžić and Serbian statesman Ilija Garašanin. Serbian nationalism was an important factor during the Balkan Wars which contributed to the decline of the Ottoman Empire, during and after World War I when it contributed to the dissolution of the Austro-Hungarian Empire, and again during the breakup of Yugoslavia and the Yugoslav Wars of the 1990s.
