Eastern Hallway                                        -      N      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      S      -

Engaged columns form the articulated opening of this arch.  The area
between the arch proper and the framing columns are filled with reliefs
depicting the reign of Diocletian and his three companions.  Blazing light
shines in from the stain-glass window to your west.  Beneath the
sophisticated arch runs the western hallway which extends north and south.