List of Famous people born in Istanbul, Istanbul Province

Mark of Ephesus was a hesychast theologian of the late Palaiologan period of the Byzantine Empire who became famous for his rejection of the Council of Ferrara-Florence (1438–1439). As a monk in Constantinople, Mark was a prolific hymnographer and a devoted Palamite. As a theologian and a scholar, he was instrumental in the preparations for the Council of Ferrara-Florence, and as Metropolitan of Ephesus and delegate for the Patriarch of Alexandria, he was one of the most important voices at the synod. After renouncing the Council as a lost cause, Mark became the leader of the Orthodox opposition to the Union of Florence, thus sealing his reputation as a defender of Eastern Orthodoxy and pillar of the Eastern Orthodox Church.

Agop Dilâçar was a Turkish-Armenian linguist who specialized in Turkic languages and the first Secretary General and head specialist of the Turkish Language Association. He was proficient in 12 languages, and in addition to Armenian and Turkish, Dilâçar knew English, Greek, Spanish, Azerbaijani, Latin, German, Russian and Bulgarian.

Janus Lascaris, also called John Rhyndacenus, was a noted Greek scholar in the Renaissance.

Theodosius was the eldest son of Byzantine Emperor Maurice and was co-emperor from 590 until his deposition and execution during a military revolt in November 602. Along with his father-in-law Germanus, he was briefly proposed as successor to Maurice by the troops, but the army eventually favoured Phocas instead. Sent in an abortive mission to secure aid from Sassanid Persia by his father, Theodosius was captured and executed by Phocas's supporters a few days after Maurice. Nevertheless, rumours spread that he had survived the execution, and became popular to the extent that a man who purported to be Theodosius was entertained by the Persians as a pretext for launching a war against Byzantium.

Patroklos Karantinos was a Greek architect of early modernism in Greece. He was born in Constantinople and died in Athens.

Menander Protector, Byzantine historian, was born in Constantinople in the middle of the 6th century AD. The little that is known of his life is contained in the account of himself quoted in the Suda. Menander mentions his father Euphratas, who came from Byzantium, and his brother Herodotus. He at first took up the study of law, but abandoned it for a life of pleasure. When his fortunes were low, the patronage accorded to literature by the Emperor Maurice, at whose court he was a military officer, encouraged him to try writing history.

Hakan Canbazoğlu is a Turkish professional footballer who most recently played as a goalkeeper for Boluspor.