Built in the 12th century as an extension to a small 6th century Byzantine church, the church is located in the walled part of the city. Dedicated to St. Nicholas, it was associated with Thamas à Becket. In the 16th century it became the Greek Orthodox Cathedral. When Christian churches were closed by the Ottomans, it became a grain store and covered market, or bedestan. In poor condition with the roof collapsed and structural damage, the five-year restoration was a project of the United Nations Development Programme. Since 2009 it is used as an active multicultural center.