04/7: Two faces on the arch's left side
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To the left of the arch are two pillars that contain three faces. This can be compared to Rubin's vase in reverse, where the two faces should have actually incorporated a vase within them, but instead they are delineated by the vase-like pillar and facing different directions.
05/7 The isolated face between the columns
This one is the hardest to understand. The birds that make up the face are hidden between the other two faces and resemble a face's nose and eyes.
