The three central upper panels show a Deësis of monumental and enthroned figures, each with a halo. They are the Virgin Mary to the left, John the Baptist to the right, and a central figure who may be either God or Christ – a distinction much debated amongst art historians. Theories include that the panel shows Christ in Majesty dressed as in a priest's vestments, God the Father, or the Holy Trinity amalgamated into a single person. The figure looks towards the viewer with his hand raised in blessing, in a panel filled with inscriptions and symbols. There are Greek inscriptions decorated with pearls on the hem of his robe or mantle, which, taken from Revelation, read ("King of Kings, and Lord of Lords").