anchor: You enter the Haghia Sophia church through the central portal, acrosea worn and well polished threshold of verd antique, and under a ninth-century mosaic of Christ Pantocrator, into the long, narrow narthex, running to right and left.
positive: You go inside the Hagia Sophia church through the central portal and then pass under a mosaic of Christ.
negative: You enter the Hagia Sophia through the portal on the left.