Fourth Crusade in the context of "Pontic Greeks"

Arbanon (Old Gheg: Arbënia, Old Tosk: Arbëria; Latin: Arbanum) was a medieval principality in present-day Albania, ruled by the native Progoni family, and the first Albanian state to emerge in recorded history. The principality was established in 1190 by the Albanian archon Progon in the region surrounding Kruja, to the east and northeast of Venetian territories. Progon was succeeded by his sons Gjin and then Demetrius, who managed to retain a considerable degree of autonomy from the Byzantine Empire. In 1204, Arbanon attained full, though temporary, political independence, taking advantage of the weakening of Constantinople following its pillage during the Fourth Crusade. However, Arbanon lost its large autonomy c. 1216, when the ruler of Epirus, Michael I Komnenos Doukas, started an invasion northward into Albania and Macedonia, taking Kruja and ending the independence of the principality. From this year, after the death of Demetrius, the last ruler of the Progoni family, Arbanon was successively controlled by the Despotate of Epirus, then by the Bulgarian Empire and, from 1235, by the Empire of Nicaea.

During this period, the area was ruled by the Greco-Albanian lord Gregorios Kamonas, the new spouse of Demetrius' Serbian former wife Komnena Nemanjić, and by Golem (Gulam), a local magnate who had married Kamonas' and Komnena's daughter. Arbanon was eventually annexed in the winter of 1256–57 by the Byzantine statesman George Akropolites. Golem subsequently disappeared from historical records. Akropolites' historical writings are the main primary source for late Arbanon and its history.

Trabzon is a city on the Black Sea coast of northeastern Turkey and the capital of Trabzon Province. Historically known as Trebizond, the city was founded in 756 BC as Trapezous by colonists from Miletus. It was added into the Achaemenid Empire by Cyrus the Great and was later part of the independent Kingdom of Pontus that challenged Rome until 68 BC. Thenceforth part of the Roman and later Byzantine Empire, the city was the capital of the Empire of Trebizond, one of the successor states of the Byzantine Empire after the Fourth Crusade in 1204. In 1461 it came under Ottoman rule. During the early modern period, Trabzon, because of the importance of its port, again became a focal point of trade to Persia and the Caucasus. Today Trabzon is the second largest city and port on the Black Sea coast of Turkey with a population of almost 300,000. The urban population of the city is 330,836 (Ortahisar), with a metropolitan population of 822,270. Trabzon has 18 districts in total.

The Frankish Occupation (Medieval Greek: Φραγκοκρατία, romanized: Frankokratia; anglicized as 'Francocracy'), also known as the Latin Occupation (Λατινοκρατία, Latinokratía) and, for the Venetian domains, Venetian Occupation (Βενετοκρατία / Ενετοκρατία, Venetokratía / Enetokratía), were the collection of primarily French and Italian states, fiefs and colonies that were established by the Partitio terrarum imperii Romaniae on the territory of the partitioned Byzantine Empire following the Sack of Constantinople of 1204 during the Fourth crusade.

The terms Frankokratia and Latinokratia derive from the name given by the Orthodox Greeks to the Western French and Italians who originated from territories that once belonged to the Frankish Empire, as this was the political entity that ruled much of the former Western Roman Empire after the collapse of Roman authority and power. The span of the Frankokratia period differs by region: the political situation proved highly volatile, as the Frankish states fragmented and changed hands, and the Greek successor states re-conquered many areas.

The Crusades were a series of military campaigns launched by the papacy between 1095 and 1291 against Muslim rulers for the recovery and defence of the Holy Land (Palestine), encouraged by promises of spiritual reward. The First Crusade was proclaimed by Pope Urban II at the Council of Clermont on 27 November 1095 in response to a Byzantine appeal for aid against the advancing Seljuk Turks. By this time, the papacy's position as head of the Catholic Church had strengthened, and earlier conflicts with secular rulers and wars on Western Christendom's frontiers had prepared it for the direction of armed force in religious causes. The First Crusade led to the creation of four Crusader states in the Middle East, whose defence required further expeditions from Catholic Europe. The organisation of such large-scale campaigns demanded complex religious, social, and economic institutions, including crusade indulgences, military orders, and the taxation of clerical income. Over time, the crusading movement expanded to include campaigns against pagans, Christian dissidents, and other enemies of the papacy, promoted with similar spiritual rewards and continuing into the 18th century.

The Crusade of 1101, the earliest papally sanctioned expedition inspired by the First Crusade, ended in disastrous defeats. For several decades thereafter, only smaller expeditions reached the Holy Land, yet their role in consolidating and expanding the Crusader states was pivotal. The fall of Edessa, the capital of the first Crusader state, prompted the Second Crusade, which failed in 1148. Its failure reduced support for crusading across Latin Christendom, leaving the Crusader states unable to resist Saladin's expansion. Having united Egypt and Muslim Syria under his rule, Saladin destroyed their combined armies at the Battle of Hattin in 1187. The Crusader states survived largely owing to the Third Crusade, a major campaign against Saladin, though Jerusalem remained under Muslim control. Initially directed against Egypt, the Fourth Crusade was diverted to the Byzantine Empire, culminating in the Sack of Constantinople and the establishment of the Latin Empire in 1204. The Fifth Crusade again targeted Egypt but failed to conquer it in 1219–21. By this period, crusade indulgences could also be obtained through other campaigns—such as the Iberian, Albigensian, and Northern Crusades—thereby diminishing enthusiasm for expeditions in the eastern Mediterranean.

The Theme of Cherson (Greek: θέμα Χερσῶνος, Thema Chersōnos), originally and formally called the Klimata (Greek: τὰ Κλίματα), was a Byzantine theme (a military-civilian province) located in the southern Crimea, headquartered at Cherson.

The theme was officially established in the early 830s and was an important centre of Black Sea commerce. Despite the destruction of the city of Cherson in the 980s, the theme recovered and prospered, enduring until it became a part of the Empire of Trebizond after the dissolution of the Byzantine Empire in 1204.

The Latin Empire, also referred to as the Latin Empire of Constantinople or the Constantinopolitan Empire, was a feudal Crusader state founded by the leaders of the Fourth Crusade on lands captured from the Byzantine Empire. The Latin Empire was intended to replace the Byzantine Empire as the Western-recognized Roman Empire in the east, with a Catholic emperor enthroned in place of the Eastern Orthodox Roman emperors. The main objective to form a Latin Empire was planned over the course of the Fourth Crusade, promoted by crusade leaders such as Boniface I of Montferrat, as well as the Republic of Venice.

The Fourth Crusade had originally been called to retake the Muslim-controlled city of Jerusalem, but a sequence of economic and political events culminated in the Crusader army sacking the city of Constantinople, the capital of the Byzantine Empire. Originally, the plan had been to restore the deposed Byzantine Emperor Isaac II Angelos, who had been usurped by Alexios III Angelos, to the throne. The crusaders had been promised financial and military aid by Isaac's son Alexios IV, with which they had planned to continue to Jerusalem. When the crusaders reached Constantinople, the situation quickly turned volatile, and while Isaac and Alexios briefly ruled, the crusaders did not receive the payment they had hoped for. In April 1204, they captured and plundered the city's enormous wealth.

The Imperial Library of Constantinople, in the capital city of the Byzantine Empire, was the last of the great libraries of the ancient world. Long after the destruction of the Great Library of Alexandria and the other ancient libraries, it preserved the knowledge of the ancient Greeks and Romans for almost 1,000 years. A series of unintentional fires over the years and wartime damage, including the raids of the Fourth Crusade in 1204, impacted the building and its contents. While there were many reports of texts surviving into the Ottoman era, no substantive portion of the library has ever been recovered. The library was founded by Constantius II (reigned 337–361 AD), who established a scriptorium so that the surviving works of Greek literature could be copied for preservation. The Emperor Valens in 372 employed four Greek and three Latin scribes. The majority of Greek classics known today are known through Byzantine copies originating from the Imperial Library of Constantinople.

Demetrio Progoni (Albanian: Dhimitër Progoni) was an Albanian leader who ruled as Prince of the Albanians from 1208 to 1216 the Principality of Arbanon, the first Albanian quasi state. He was the successor and brother of Gjin Progoni and their father, Progon of Kruja. Following the collapse of the Byzantine Empire in the Fourth Crusade, he managed to further secure the independence of Arbanon and extended its influence to its maximum height. Throughout much his rule he was in struggle against the Republic of Venice, Zeta of Đorđe Nemanjić and later the Despotate of Epiros and inversely, maintained good relations with their rivals, the Republic of Ragusa, and at first Stefan Nemanjić of Raška, whose daughter Komnena he married. The Gëziq inscription found in the Catholic church of Ndërfandë (modern Gëziq) shows that by the end of his life he was a Catholic. In Latin documents, of the time, he is often styled as princeps Arbanorum (prince of the Albanians) and in Byzantine documents as megas archon and later as Panhypersebastos. Under increasing pressure from the Despotate of Epiros, his death around 1216 marks the end of Arbanon as a state and the beginning of a period of autonomy until its final ruler Golem of Kruja joined the Nicaean Empire. The annexation sparked the Rebellion of Arbanon in 1257. He didn't have any sons to continue his dynasty, but his wealth and a part of his domain in Mirdita passed after Demetrio's death to his underage nephew, Progon (son of Gjin), whom he named protosevastos. The Dukagjini family which appeared in historical record 70 years later in the same region may have been relatives or direct descendants of the Progoni.

In historical record, Dhimitër Progoni is the first ruler to call himself Prince of the Albanians and the first to identify his domain as Principatum Albaniae (Principality of Albania/Arbanon). Many later feudal rulers of Albania would lay claim to the same title and present their rule as the continuation of this state. The first to do so was Charles I of Anjou who sought to legitimise the Kingdom of Albania as a descendant state of the Principality of Arbanon about 60 years later, in 1272.

The sack of Constantinople occurred in April 1204 and marked the culmination of the Fourth Crusade. Crusaders sacked and destroyed most of Constantinople, the capital of the Byzantine Empire. After the capture of the city, the Latin Empire (known to the Byzantines as the Frankokratia, or the Latin occupation) was established and Baldwin IX of Flanders crowned emperor in Hagia Sophia.

After the city's sacking, most of the Byzantine Empire's territories were divided up among the Crusaders. Byzantine aristocrats also established a number of small independent splinter states—one of them being the Empire of Nicaea, which eventually recaptured Constantinople in 1261 and proclaimed the reinstatement of the Empire. However, the restored Empire never managed to reclaim all its former territory or attain its earlier economic strength, and it gradually succumbed to the rising Ottoman Empire over the following two centuries.