Trompe l'oeil ceiling.

Galleria Doria Pamphilj - Rome

"Palazzo Doria Pamphilj dates to the mid-15th century, but its current look was largely the work of the current owners, the Doria Pamphilj family, who acquired it in the 18th century. The Pamphilj’s golden age, during which the family collection was started, came during the papacy of one of their own, Innocent X (r 1644–55).

The opulent picture galleries, decorated with frescoed ceilings and gilded mirrors, are hung with floor-to-ceiling paintings, all ordered chronologically."

www.lonelyplanet.com/italy/rome/sights/museums-galleries/galleria-doria-pamphilj

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