Q:Information: - Marcian ( Latin : Flavius Marcianus ; fl . 469 -- 484 AD ) was a member of the House of Leo and a usurper against Emperor Zeno in 479 . - A saint, also historically known as a hallow, is a term used for a person who is recognized as having an exceptional degree of holiness or likeness to God. Depending on the context and denomination, the term also retains its original Christian meaning, as any believer who is "in Christ" and in whom Christ dwells, whether in Heaven or on Earth. In Anglican, Roman Catholic, Eastern Orthodox, Lutheran, and Oriental Orthodox doctrine, all of their faithful deceased in Heaven are considered to be saints, but some are considered worthy of greater honor or emulation; official ecclesiastical recognition, and consequently veneration, is given to some saints through the process of canonization in the Catholic Church or glorification in the Eastern Orthodox Church. - Marcian (392 27 January 457) was Eastern Roman Emperor from 450 to 457. Marcian's rule marked a recovery of the Eastern Empire, which the Emperor protected from external menaces and reformed economically and financially. On the other side, the isolationistic policies of Marcian left the Western Roman Empire without help against barbarian attacks, which materialized in the Italian campaigns of Attila and in the Vandal sack of Rome (455). The Eastern Orthodox Church recognizes Marcian as a saint for his role in convoking the Council of Chalcedon. - The Council of Chalcedon (or ) was a church council held from October 8 to November 1, AD 451, at Chalcedon. The Council is numbered as the fourth ecumenical council by the Great Church. A minority of Christians do not agree with the council's teachings. Its most important achievement was to issue the Chalcedonian Definition. The Council's judgements and definitions regarding the divine marked a significant turning point in the Christological debates. Chalcedon was a city in Bithynia, on the Asian side of the Bosphorus; today the city it is part of the Republic of Turkey and is known as Kadkoy (a district of Istanbul). - In historiography, the Western Roman Empire consists of the western provinces of the Roman Empire at any one time during which they were administered by a separate independent Imperial court, coequal with (or only nominally subordinate to) that administering the eastern half. Both "Western Roman Empire" and "Eastern Roman Empire" (or "Byzantine Empire") are modern terms describing "de facto" independent entities; however, at no point did Romans consider the Empire split into two, but rather considered it a single state governed by two separate Imperial courts out of administrative expediency. The view that the Empire was impossible to govern by one emperor was established by Diocletian following the disastrous civil wars and disintegration of the Crisis of the 3rd century, and was instituted in Roman law by his introduction of the Tetrarchy in AD 285, a form of government which was legally to endure in one form or another for centuries. The Western Court was periodically abolished and recreated for the next two centuries until final abolition by the Emperor Zeno in 480, by which time there was little effective central control left in the area legally administered by the Western Court. - The sack of 455 was the second of three sacks of Rome; it was conducted by the Vandals, who were then at war with the usurping Western Roman Emperor Petronius Maximus. - The House of Leo ruled the Eastern Roman Empire from 457 to 518 (and varying parts of the Western Roman Empire from 474 to 480). After reading the paragraphs above, choose the best answer for the entity that related to 'marcian ' with the relationship of 'country of citizenship'. Choices: - byzantine empire - earth - roman empire - turkey - vandals
A:
byzantine empire