Ankara Turkish President Rajab Tayyip Erdogan has signed a presidential decree to convert the historic building of Aya Sofia in Istanbul into a mosque. The presidential decree was issued by the Turkish president on Friday following a ruling by a Turkish court in which the status of the museum of Aya Sofia’s building was abolished.

This building which was built as a church one and a half thousand years ago, The decision to change its status has been controversial.

During the Ottoman Empire, the building was converted from a church to a mosque. Russia’s Orthodox Church has expressed regret on the decision of the Turkish court and said that when taking a decision about Aya Sofia, their concerns have not been taken.

The Russian Orthodox Church said that this decision will only increase the differences.