Atrium                                                 -      N      - 
(-------------------------------------------------)     W <---(M)---> E
                                                        -      S      -

The area within the atrium has been left unencumbered, save for statues
commemorating local dignitaries and the four emperors, this is where daily
commerce is conducted and pedestrian traffic travels.  The roof overhead is
partially open to the sky, not only to admit light but also to channel
rainwater into a basin, where it is stored in cisterns for use by the palace
residents.  The peristyle aisle stretches north, and the atrium continues
east and west.  The East Arch of Diocletian is to your south.  
A Diocletian commoner goes about his daily chores here.
A Diocletian commoner goes about his daily chores here.