Beneath the West Arch of Diocletian                    -      N      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      -     SE

The reliefs on this arch appear to be a presentation of a pictorial
narrative.  From what you can see, it appears to be telling the tale of the
establishment of the tetrarchy.  In order to restore power to his
destablized kingdom, Diocletian decided to share power with his three
potential rivals, and so he established the tetrarchy (rule by four).  The
relief goes on to show that, together the four emperors ruled without strife
and have maintained this area without opposition.  Curiously the relief ends
there, you now turn your eyes to the actual palace.  To your north you see
the central section of the palace, which appears to include gardens, lecture
halls, and other rooms, all enclosed within a great concrete perimeter wall.
     The sliced-off leg of a Diocletian commoner is lying here.