They have changed it since you last visited. It is now primarily used as a mosque instead of a museum. The old floors have been covered by a carpet and it hosts

They have changed it since you last visited. It is now primarily used as a mosque instead of a museum. The old floors have been covered by a carpet and it hosts several prayers a day. https://www.dailysabah.com/turkey/istanbul/istanbuls-reverted-hagia-sophia-mosque-welcomes-millions-in-a-year https://www.dailysabah.com/turkey/istanbul/istanbuls-reverte...