Question: What European era towards the end of the 18th century was the Pena Palace built in?

Context paragraphs:
Aljafería: The Aljafería Palace (Spanish: "Palacio de la Aljafería" ; Arabic: قصر الجعفرية‎ ‎ , tr.  "Qasr al-Jaʿfariya") is a fortified medieval Islamic palace built during the second half of the 11th century in the Taifa of Zaragoza of Al-Andalus, present day Zaragoza, Aragon, Spain.  It was the residence of the Banu Hud dynasty during the era of Abu Jaffar Al-Muqtadir after abolishing Banu Tujibi of Kindah dynasty.  The palace reflects the splendor attained by the kingdom of the taifa of Zaragoza at the height of its grandeur.  The palace currently contains the Cortes (regional parliament) of the autonomous community of Aragon.

Kavathe Yamai: Kavathe Yemai is a village located in Shirur Taluka in the Pune district of Maharashtra state.  In earlier times village was once located on the banks of the Ghod River (appx 5.8 km away from present location).  The village later moved to the current location when Maratha General Anand Rao I Pawar (of Dhar State) built a walled city (at current location).  The village boasts of the historical & cultural heritage.  The Palace built by Pawar dynasty in 18th century; various temples in Hemadpanthi architectural style are still in good condition.  This village was actually a walled city but with expansion of the village borders/habitation, the surrounding walls and its huge gates has crumbled down.

Kalinga II: Kalinga II (Odia: ଦ୍ବିତୀୟ କଳିଙ୍ଗ) was a powerful monarch and possibly an emperor from around the speculated era towards the end of 7th Century B.C.E.  He was the son of Chullakalinga, the youngest son of Kalinga I who had married a virtuous princess from Sagala (Madra) .  Kalinga II ascended the throne of the ancient state of Kalinga after the death of his paternal uncle Mahakalinga.  Kalinga II finds mention in early Buddhist Jataka records of Chullakalinga Jataka (named after his father) and Kalingabodhi Jataka.  He had spent most of his young life in the forests of Himavat where his father lived in exile.  Trained with qualities of a king by his father and maternal grandfather, he was asked by Chullakalinga to go back to take the charge of his ancestral kingdom.

Romanticism: Romanticism (also the Romantic era or the Romantic period) was an artistic, literary, musical and intellectual movement that originated in Europe toward the end of the 18th century, and in most areas was at its peak in the approximate period from 1800 to 1850.  Romanticism was characterized by its emphasis on emotion and individualism as well as glorification of all the past and nature, preferring the medieval rather than the classical.  It was partly a reaction to the Industrial Revolution, the aristocratic social and political norms of the Age of Enlightenment, and the scientific rationalization of nature—all components of modernity.  It was embodied most strongly in the visual arts, music, and literature, but had a major impact on historiography, education, and the natural sciences.  It had a significant and complex effect on politics, with romantic thinkers influencing liberalism, radicalism, conservatism and nationalism.

Palazzo Filangeri-Cutò: The Palazzo Filangeri-Cutò was a palace built in the 17th century by the Corberas, a noble family of Spanish origin, in the small Sicilian town of Santa Margherita di Belice.  The palace provided the setting for Giuseppe Tomasi di Lampedusa's celebrated novel "The Leopard", which traced the evolution of Sicilian aristocracy in the 19th century.

Swainston Manor: Swainston Manor lies 1 mi to the east of Calbourne, Isle of Wight, England.  Now a hotel, Swainston Manor was originally a manor house on a site dating back to 735 CE.  Eight hundred years ago it became the location of a palace built by the Bishops of Winchester.  It has a 12th-century chapel on its 32 acre .  Most of the present building was constructed in the 18th century, but an attached hall dates from the 13th century.  Warwick the Kingmaker reportedly dined at Swainston Manor.  It is a Grade II* listed building.

Kadriorg Palace: Kadriorg Palace (Estonian: "Kadrioru loss" , German: "Schloss Katharinental" ) is a Petrine Baroque palace built for Catherine I of Russia by Peter the Great in Tallinn, Estonia.  Both the Estonian and the German name for the palace means "Catherine's valley".  It was built after the Great Northern War to Nicola Michetti's designs by Gaetano Chiaveri and Mikhail Zemtsov.  The palace currently houses the Kadriorg Art Museum, a branch of the Art Museum of Estonia, displaying foreign art from the 16th to 20th centuries.  The KUMU branch of the museum, showing Estonian art from the 18th century onwards is furthermore situated in the park.

Palacio de La Cava: The Palacio de los Duques de Maqueda, also known as Palacio de La Cava is a palace located in Toledo, in Castile-La Mancha, Spain.  In the vicinity of the Puerta del Cambrón and the Monastery of San Juan de los Reyes was this palace built by the Cárdenas family, Dukes of Maqueda and magistrates of Toledo between the 16th and 18th centuries.  Of the remains that are conserved it emphasizes the portal, a unique one of Mudéjar style built in 14h century.

Pena Palace: The Pena Palace (Portuguese: "Palácio da Pena" ) is a Romanticist castle in São Pedro de Penaferrim, in the municipality of Sintra, Portugal.  The castle stands on the top of a hill in the Sintra Mountains above the town of Sintra, and on a clear day it can be easily seen from Lisbon and much of its metropolitan area.  It is a national monument and constitutes one of the major expressions of 19th-century Romanticism in the world.  The palace is a UNESCO World Heritage Site and one of the Seven Wonders of Portugal.  It is also used for state occasions by the President of the Portuguese Republic and other government officials.

Jinjira Palace: Jinjira Palace also known as Qasr-i-Jazirah (palace of the island), is a palace built by the Mughal governor, Ibrahim Khan II, in the late 17th century in Bengal, on the banks of the Old Ganges river.

Supporting paragraphs: Pena Palace Romanticism
Answer: Romanticism