From OrthoChristian:

“Turkish President Recep Tayyip Erdogan has instructed his aides to conduct a comprehensive study of the possibility of converting the status of the famous Agia Sophia in Istanbul from a museum back into a mosque, the Turkish paper Hurriyet reported today.”

The celebrated Orthodox cathedral was built by the Byzantine emperor St. Justinian the Great in what was then the imperial capital, Constantinople. It remains for Orthodoxy the ultimate symbol of the Ottoman rule over Christians that began with the overthrow of the Byzantine Empire in 1453.

The church has been secularized since 1931 and started use as a museum four years later.

This latest move is sure to inflame Orthodox passions, especially in Greece.