Photo credit: Ippar-palacio-pena-aerea" by Unknown, courtesy of IPPAR - IPPAR. Via Wikimedia Commons.

One of the major expressions of 19th-century Romanticism in the world. Mixture of eclectic styles: Neo-Gothic, Neo-Manueline, Neo-Islamic and Neo-Renaissance.
Commissioned by King consort Ferdinand II.
Built between 1842 and 1854.
On the top of a hill above the town of Sintra. Seen from Lisbon on a clear day.

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The Pena National Palace seen from Lisbon ?