The first building was a basilica (destroyed by fire) and then it was rebuilt as a Cathedral.
St Peters's Basilica in Rome
The Hagia Sophia was built in Constantinople as its cathedral church.
The cathedral church of Hagia Sophia (meaning Divine Wisdom).
There are several well-known cathedrals. These include the cathedral at Canterbury, England, the Notre Dame (Paris) Cathedral, the Hagia Sophia in Istanbul, the Cathedral of Cordoba, St. Peter's Basilica in Rome, the Washington National Cathedral, and Westminster Abbey.
The Hagia Sophia was the largest and most important Greek Orthodox Cathedral of the Byzantine Empire.
It is a former Orthodox Patriarchal Basilica and later a Mosque. It served as a Cathedral for Constantinople from 360 until 1463 and then a mosque until 1934. It was opened as a museum in 1935
The Hagia Sophia Cathedral was the main place of worship.
It is called the Cathedral of "Hagia Sophia" which means Divine Wisdom.
It was the largest in the world for nearly 1000 years
That would be Hagia Sophia, the most famous church building in the world.
It is an ancient cathedral of the Church of Constantinople located in Istanbul, Turkey.
The Cathedral is the Hagia Sophia -- pronounced ah-ya so-fee-a. (Greek Ἁγία Σοφία / Turkish Ayasofya)