Turkey's President Erdogan has formally converted the former Hagia Sophia cathedral into a mosque to drum up support for his Islamic-rooted party... The move came hours after Turkey's highest administrative court issued a landmark ruling that unanimously annulled the 1934 cabinet decision to renovate the site into a museum. It meant the green light was given for Erdogan to restore the UNESCO World Heritage site's previous status as a mosque, reopening it to Muslim worship.