In an undated handout photo, the atrium at the Madre contemporary art museum in Naples, Italy, incorporating artifacts from Pompeii. The new exhibition “Pompeii at Madre: Archaeological Material” presents artworks that spent nearly 2,000 years buried under ash, some for the first time. (Amedeo Benestante via The New York Times) -- NO SALES; FOR EDITORIAL USE ONLY WITH STORY SLUGGED POMPEII ARTWORK EXHIBIT BY HOROWITZ FOR JAN. 4, 2018. ALL OTHER USE PROHIBITED. --