Russian Orthodox leader warns Turkey over Hagia Sophia move

Turkey's top court is debating whether one of the architectural wonders of the world can be redesignated as a mosque, a move that could inflame tensions with the West and the Christian community. 

A ruling expected in the coming days on the site, which is currently a museum.

Kirill said in a statement he was "deeply concerned" by the moves, describing Hagia Sophia as "one of the greatest monuments of Christian culture".

"A threat to Hagia Sophia is a threat to the whole of Christian civilisation, and therefore to our spirituality and history," the Orthodox church leader said.

Read also: Turkey's Erdogan rejects criticism over Hagia Sophia landmark

"To this day, for every Russian Orthodox person, Hagia Sophia is a great Christian shrine," he said, urging the Turkish government to be cautious.

He said that altering the current neutral status of the historic building would cause "deep pain" among the Russian people.

Hagia Sophia was first constructed as a cathedral in the Christian Byzantine Empire in the sixth century but was converted into a mosque after the Ottoman conquest of Constantinople in 1453.

Transforming it into a museum was a key reform of the post-Ottoman authorities under the modern republic's founder Mustafa Kemal Ataturk.

But calls for it to serve again as a mosque have sparked anger among Christians and tensions between historic foes and uneasy NATO allies Turkey and Greece.

Agencies contributed to this report.

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