03/13/2013 06:14 pm ET Updated May 13, 2013

82nd & Fifth: THRESHOLD by Keith Christiansen

Curator Keith Christiansen argues that Berlinghiero's depiction of the Madonna in this work is magical--unlike any other--because her expression is "forever." He explains, "It's an expression that can be dead, unless we engage ourselves in it."

Take a closer look at Berlinghiero's Madonna and Child by selecting hotspots.

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