Medieval Greek language in the context of "Frankokratia"

The Imperial University of Constantinople, sometimes known as the University of the Palace Hall of Magnaura (Greek: Πανδιδακτήριον τῆς Μαγναύρας), was an Eastern Roman educational institution that could trace its corporate origins to 425 AD, when the emperor Theodosius II founded the Pandidacterium (Medieval Greek: Πανδιδακτήριον).

The Pandidakterion was restructured in 1046 by Constantine IX Monomachos who created the Departments of Law (Διδασκαλεῖον τῶν Νόμων) and Philosophy (Γυμνάσιον).

The Despotate of Epirus (Medieval Greek: Δεσποτᾶτον τῆς Ἠπείρου) was one of the Greek rump states of the Byzantine Empire established in the aftermath of the Fourth Crusade in 1204 by a branch of the Angelos dynasty. It claimed to be the legitimate successor of the Byzantine Empire during the subsequent struggle for Constantinople, along with the Empire of Nicaea and the Empire of Trebizond; its rulers briefly proclaiming themselves as Emperors in 1227–1242 (during which it is most often called the Empire of Thessalonica). The term "Despotate of Epirus" is, like "Byzantine Empire" itself, a modern historiographic convention and not a name in use at the time.

The Despotate was centred on the region of Epirus, encompassing also Albania and the western portion of Greek Macedonia and also included Thessaly and western Greece as far south as Nafpaktos. Through a policy of aggressive expansion under Theodore Komnenos Doukas the Despotate of Epirus also briefly came to incorporate central Macedonia, with the establishment of the Empire of Thessalonica in 1224, and Thrace as far east as Didymoteicho and Adrianople, and was on the verge of recapturing Constantinople and restoring the Byzantine Empire before the Battle of Klokotnitsa in 1230 where he was defeated by the Bulgarian Empire. After that, the Epirote state contracted to its core in Epirus and Thessaly, and was forced into vassalage to other regional powers. It nevertheless managed to retain its autonomy until being conquered by the restored Palaiologan Byzantine Empire in ca. 1337. In the 1410s, Carlo I Tocco, Count Palatine of Cephalonia and Zakynthos, managed to reunite the core of the Epirote state, but his successors gradually lost it to the advancing Ottoman Empire, with the last stronghold, Vonitsa, falling to the Ottomans in 1479.

Corfu (/kɔːrˈf(j)uː/, also US: /ˈkɔːrf(j)uː/) or Kerkyra (Greek: Κέρκυρα, romanized: Kérkyra, pronounced [ˈcercira] ; Ancient Greek: Κόρκυρα, romanized: Kórkyra, pronounced [kórkyra]; Medieval Greek: Κορυφώ, romanized: Koryfó; Italian: Corfù; Latin: Corcyra) is a city and a former municipality on the island of Corfu, Ionian Islands, Greece. Since the 2019 local government reform, it is part of the municipality Central Corfu and Diapontian Islands. It is the capital of the municipality and of the Corfu regional unit. The city also serves as a capital for the region of the Ionian Islands. The city (with a population of 23,541 residents, while the whole island has a population of 101,600 residents) is a major tourist attraction and Greek regional centre and has played an important role in Greek history since antiquity.

The Suda or Souda (/ˈsuːdə/; Medieval Greek: Σοῦδα Soûda [ˈsuða]; Latin: Suidae Lexicon) is a large 10th-century Byzantine encyclopedia of the ancient Mediterranean world, formerly attributed to an author called Soudas (Σούδας) or Souidas (Σουίδας). It is an encyclopedic lexicon, written in Greek, with 30,000 entries, many drawing from ancient sources that have since been lost, and often derived from medieval Christian compilers.

The Varangians (/vəˈrændʒiənz/ və-RAN-jee-ənz; Old Norse: Væringjar; Medieval Greek: Βάραγγοι, romanized: Várangoi; Old East Slavic: варяже, romanized: varyazhe, or варяги, varyagi) were Viking warriors, traders and settlers, mostly from present-day Sweden, who settled in the territories of present-day Belarus, Russia and Ukraine from the 8th and 9th centuries and established the state of Kievan Rus' as well as the principalities of Polotsk and Turov. They also formed the Byzantine Varangian Guard.

According to the 12th-century Primary Chronicle, a group of Varangians known as the Rus' settled in Novgorod in 862 under the leadership of Rurik. Before Rurik, the Rus' might have ruled an earlier hypothetical polity known as the Rus' Khaganate. Rurik's relative Oleg conquered Kiev in 882 and established the state of Kievan Rus', which was later ruled by Rurik's descendants.

Alexios III Angelos (Medieval Greek: Ἀλέξιος Ἄγγελος, romanized: Aléxios Ángelos; c. 1153 – 1211), Latinized as Alexius III Angelus, was Byzantine Emperor from March 1195 to 17/18 July 1203. He reigned under the name Alexios Komnenos (Ἀλέξιος Κομνηνός; Aléxios Komnēnós) associating himself with the Komnenos dynasty (from which he was descended cognatically).

A member of the extended imperial family, Alexios came to the throne after deposing, blinding and imprisoning his younger brother Isaac II Angelos. The most significant event of his reign was the attack of the Fourth Crusade on Constantinople in 1203, on behalf of Alexios IV Angelos.

Sebastokrator (Medieval Greek: Σεβαστοκράτωρ, romanized: Sevastokrátor, lit. 'August Ruler', Byzantine Greek pronunciation: [sevastoˈkrator]; Bulgarian: севастократор, romanized: sevastokrator; Serbo-Croatian: sevastokrator), was a senior court title in the late Byzantine Empire. It was also used by other rulers whose states bordered the Empire or were within its sphere of influence (Bulgarian Empire, Serbian Empire). The word is a compound of sebastós (lit. 'venerable', the Greek equivalent of the Latin Augustus) and krátōr ('ruler', the same element as is found in autokrator, 'emperor'). The wife of a Sebastokrator was named sebastokratorissa (σεβαστοκρατόρισσα, sevastokratórissa) in Greek, sevastokratitsa (севастократица) in Bulgarian and sevastokratorica in Serbian.