Kingdom of Croatia (925–1102) in the context of "Duchy of Croatia"

Croatia, officially the Republic of Croatia, is a country in Central and Southeast Europe, on the coast of the Adriatic Sea. It borders Slovenia to the northwest, Hungary to the northeast, Serbia to the east, Bosnia and Herzegovina and Montenegro to the southeast, and shares a maritime border with Italy to the west. Its capital and largest city, Zagreb, forms one of the country's primary subdivisions, with twenty counties. Other major urban centers include Split, Rijeka and Osijek. The country spans 56,594 square kilometres (21,851 square miles), and has a population of nearly 3.9 million.

The Croats arrived in modern-day Croatia, then part of Roman Illyria, in the late 6th century. In the 7th century, they organized the territory into two duchies. Croatia was first internationally recognized as independent on 7 June 879 during the reign of Duke Branimir. Tomislav became the first king by 925, elevating Croatia to the status of a kingdom. During the succession crisis after the Trpimirović dynasty ended, Croatia entered a personal union with Hungary in 1102. In 1527, faced with Ottoman conquest, the Croatian Parliament elected Ferdinand I of Austria to the Croatian throne. In October 1918, the State of Slovenes, Croats, and Serbs, independent from the Habsburg Empire, was proclaimed in Zagreb, and in December 1918, it merged into the Kingdom of Yugoslavia. Following the Axis invasion of Yugoslavia in April 1941, most of Croatia was incorporated into a Nazi-installed puppet state, the Independent State of Croatia. A resistance movement led to the creation of the Socialist Republic of Croatia, which after the war became a founding member and constituent of the Socialist Federal Republic of Yugoslavia. On 25 June 1991, Croatia declared independence, and the War of Independence was successfully fought over the next four years.

Dalmatia (/dælˈmeɪʃə, -tiə/ ; Croatian: Dalmacija [dǎlmatsija]; Italian: Dalmazia [dal'mattsja]) is a historical region located in modern-day Croatia and Montenegro, on the eastern shore of the Adriatic Sea. It is a narrow land belt stretching from the island of Rab in the north to the Bay of Kotor in the south. The Dalmatian Hinterland ranges in width from 50 kilometres in the north, to just a few kilometres in the south; it is mostly covered by the rugged Dinaric Alps. Seventy-nine islands (and about 500 islets) run parallel to the coast, the largest (in Dalmatia) being Brač, Pag, and Hvar. The largest city is Split, followed by Zadar, Šibenik, and Dubrovnik.

The name of the region stems from an Illyrian tribe called the Dalmatae, who lived in the area in classical antiquity. With the expansion of Rome, the province of Illyricum was established, and in the early 1st century it was reorganised into the province of Dalmatia, which stretched over a vast territory. Consequently, a Romance culture emerged, and the indigenous Illyrian population became romanised. Following the fall of the Western Roman Empire and the Migration Period, many different peoples passed through Dalmatia. While the local Illyro-Romans organized themselves around their city-states under Byzantine protection, the Croats arrived in the early 7th century and established the Duchy of Croatia, later becoming vassals of the Franks. With the Christianisation of the Croats, Slavic and Illyro-Roman elements began to intermingle in both language and culture. The Kingdom of Croatia was founded in 925, and it later incorporated the Theme of Dalmatia.

Islam is the second-largest religion in Europe after Christianity. Although the majority of Muslim communities in Western Europe formed as a result of immigration, there are centuries-old indigenous European Muslim communities in the Balkans, Caucasus, Crimea, and Volga region. The term "Muslim Europe" is used to refer to the Muslim-majority countries in the Balkans and the Caucasus (Albania, Azerbaijan, Bosnia and Herzegovina, Kosovo, and Turkey) and parts of countries in Central and Eastern Europe with sizable Muslim minorities (Bulgaria, Montenegro, North Macedonia, and some republics of Russia) that constitute large populations of indigenous European Muslims, although the majority are secular.

Islam expanded into the Caucasus through the Muslim conquest of Persia in the 7th century and entered Southern Europe after the Umayyad conquest of Hispania in the 8th–10th centuries; Muslim political entities existed firmly in what is today Spain, Portugal, Sicily, and Malta during the Middle Ages. The Muslim populations in these territories were either converted to Christianity or expelled by the end of the 15th century by the indigenous Christian rulers (see Reconquista). The Ottoman Empire expanded into Southeastern Europe and consolidated its political power by invading and conquering huge portions of the Serbian and Bulgarian empires, and the remaining territories of the region, including the Albanian and Romanian principalities, and the kingdoms of Bosnia, Croatia, and Hungary between the 14th and 16th centuries. Over the centuries, the Ottoman Empire gradually lost its European territories. Islam was particularly influential in the territories of Albania, Bosnia and Herzegovina, and Kosovo, and has remained the dominant religion in these countries.

The Croats of Bosnia and Herzegovina (Croatian: Hrvati Bosne i Hercegovine), often referred to as Bosnian Croats (bosanski Hrvati) or Herzegovinian Croats (hercegovački Hrvati), are native to Bosnia and Herzegovina and constitute the third most populous ethnic group, after Bosniaks and Serbs. They are one of the three constitutive nations of Bosnia and Herzegovina. Croats of Bosnia and Herzegovina have made significant contributions to the culture of Bosnia and Herzegovina. Most Croats identify themselves as Catholics and speak Croatian language.

Croats have been present in Bosnia and Herzegovina since the Slavic migrations to the Balkans. The Kingdom of Croatia under native rulers and later in personal union with Hungary encompassed large parts of Bosnia and Herzegovina in the west until the 16th century. The Croats also lived under the Kingdom of Bosnia until it fell to the Ottoman Empire in the second half of the 15th century. Between the 15th and 19th centuries, Catholics in Ottoman Bosnia and Herzegovina were often persecuted by the Ottomans, prompting many to flee the area, especially during the Great Turkish War and the Morean War in the second half of the 17th century, when their numbers were reduced to 30,000. At the end of the 17th century and in the early 18th century, the number of Catholics began to increase, with many of those who had fled returning. In the second half of the 19th century, especially during the Austro-Hungarian rule in Bosnia and Herzegovina, the Croats became active political subjects, participating in Croatian national revival. The 20th century brought political turmoil, and poor economic conditions led to increased emigration. Ethnic cleansing within Bosnia and Herzegovina in the 1990s saw Croats forced to go to different parts of Bosnia and Herzegovina, despite having lived in numerous regions before the Bosnian War. The 2013 population census in Bosnia and Herzegovina recorded 544,780 residents registering as of Croat ethnicity.

The counties of Croatia (Croatian: hrvatske županije) are the first-level administrative subdivisions of the Republic of Croatia. Since they were re-established in 1992, Croatia has been divided into 20 counties and the capital city of Zagreb, which has the authority and legal status of both a county and a city (separate from the surrounding Zagreb County). As of 2015, the counties are subdivided into 128 cities and 428 (mostly rural) municipalities. The divisions have changed over time since the medieval Croatian state. They reflected territorial losses and expansions; changes in the political status of Dalmatia, Dubrovnik and Istria; and political circumstances, including the personal union and subsequent development of relations between the Kingdom of Croatia-Slavonia and the Kingdom of Hungary.

Split (/splɪt/; Croatian: [splît] , see other names) is the second-largest city of Croatia after the capital Zagreb. It is the largest city in Dalmatia, largest city on the Croatian coast, and the seat of the Split-Dalmatia County. The Split metropolitan area is home to about 330,000 people. It lies on the eastern shore of the Adriatic Sea and is spread over a central peninsula and its surroundings. An intraregional transport hub and popular tourist destination, the city is linked to the Adriatic islands and the Apennine Peninsula. More than 1 million tourists visit it each year.

The city was founded as the Greek colony of Aspálathos (Ancient Greek: Ἀσπάλαθος) in the 3rd or 2nd century BCE on the coast of the Illyrian Dalmatae, and in 305 CE, it became the site of the Palace of the Roman emperor Diocletian. It became a prominent settlement around 650 when it succeeded the ancient capital of the Roman province of Dalmatia, Salona. After the sack of Salona by the Avars and Slavs, the fortified Palace of Diocletian was settled by Roman refugees. Split became a Byzantine city. Later it drifted into the sphere of the Republic of Venice and the Kingdom of Croatia. For much of the High and Late Middle Ages, Split enjoyed autonomy as a free city of the Dalmatian city-states, caught in the middle of a struggle between Venice and Croatia for control over the Dalmatian cities.

The Trpimirović dynasty (Croatian: Trpimirovići) was a native Croatian dynasty that ruled in the Duchy and later the Kingdom of Croatia, with interruptions by the Domagojević dynasty from 845 until 1091. It was named after Trpimir I, the first member and founder. The most prominent rulers of the Trpimirović Dynasty include Tomislav (first king of Croatia), Petar Krešimir IV and Demetrius Zvonimir. The house gave four dukes, thirteen kings and a queen.

At the time of the Roman Empire, the area of modern Croatia comprised two Roman provinces, Pannonia and Dalmatia. After the collapse of the Western Roman Empire in the 5th century, the area was subjugated by the Ostrogoths for 50 years, before being incorporated into the Byzantine Empire.

Croatia, as a polity, first appeared as a duchy in the 7th century. With the nearby Principality of Lower Pannonia, it was united and elevated into the Kingdom of Croatia which lasted from 925 until 1102. From the 12th century, the Kingdom of Croatia entered a personal union with the Kingdom of Hungary. It remained a distinct state with its ruler (Ban) and Sabor, but it elected royal dynasties from neighboring powers, primarily Hungary, Naples, and the Habsburg monarchy. From the 15th to the 17th centuries was marked by intense struggles between the Ottoman Empire to the south and the Habsburg Empire to the north.