This is the name given to the Eastern Orthodox Church where the Ecumenical Patriarch resides in Constantinople (present-day Istanbul, Turkey). It is the church founded by St Andrew the Apostle, and was the Cathedral Church during the Eastern Roman or Byzantine Empire.
It is similar to saying the papal church of Rome where the Pope resides.
The Ecumenical Patriarch in Constantinople is known as the 'first among equals' in the Orthodox Church.
Venice
The Ecumenical Patriarch (in Constantinople).
Constantinople was the capital of the Eastern Orthodox Church.
Back in the days of Constantinople, the Orthodox Church was highly involved in government and politics. Even though there was separation of Church and State, the Church exercised considerable influence in the government of Constantinople.
The patriarchal cross is a symbol in Christianity representing the authority of the church and the connection to the apostles. It is often associated with the Eastern Orthodox Church and signifies the leadership and spiritual lineage of the church leaders.
In ancient times the five Patriarchal Seats were Rome, Constantinople, Antioch, Jerusalem and Alexandria
The catholic church was never moved to constantinople, emperor constatine kept the church in Rome but moved the capitol to Constantinople. The SPRQ's belief of the church for salvation and emotional comfort kept the eastern empire alive for as long as it did, though it ultimately fell.
The Emperor
It was and is in Constantinople (Istanbul).
The Patriarch is the authoritative figure for The Greek Orthodox Church.
In the Church of Jesus Christ of Latter-day Saints (the "Mormon" church), Patriarchal Blessings are usually given on Sunday, but in some circumstances are given on other days. It is up to the discretion of the Patriarch.
The Eastern Orthodox Church in Constantinople is called the Ecumenical Patriarchate, or is sometimes called the See of St Andrew (because it was founded by St Andrew).