As we look skyward, we notice that sitting atop the tower is a corona or crown of tracery.  
  
Four-sided and representing bounded space, albeit sacred space, the corona represents the New Jerusalem,  the walled Heavenly City. While the solid trefoils over the vestibule demonstrate the divine made human, the Heavenly City resting atop the tower represents the earthly transported into the spiritual. There, walls keep their battlement shapes, but inside the battlements are quatrefoils only now carved out and hollow, filled only with sky. The heavenly city contains the forms of this world yet made over, spiritualized, for eternity. The solid forms or trefoils of the first level have been bodily resurrected yet made over.  
  
 
 
 
Note the similar tracery of London's St. Sepulcre Without Newgate with its hollow quatrefoil framed by a square placed within the battlement. The televison antenna is not, as far as we know, medieval.
 
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