Source : Webster's Revised Unabridged Dictionary (1913)

Ecce homo \Ec"ce ho"mo\ [L., behold the man. See John xix. 5.]
   (Paint.)
   A picture which represents the Savior as given up to the
   people by Pilate, and wearing a crown of thorns.

Source : WordNet®

ecce homo
     n : a representation (a picture or sculpture) of Jesus wearing a
         crown of thorns