Indoor spaces with lots of natural light

I believe the answer is:

atria

(Other definitions for atria that I've seen before include "Central courts (in ancient Rome or shopping arcades)" , "Covered courts" , "Apartments" , "Public spaces with galleries" , "Open-roofed entrance halls (Roman) - glass-roofed central halls (modern)" .)

I've seen this clue in The New York Times.

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