The Alcázar of Seville is a royal palace, built for the Christian king Peter of Castile. It was built by Castilian Christians on the site of an Abbadid Muslim residential fortress destroyed after the Christian conquest of Seville. The palace, a pre-eminent example of Mudéjar architecture in the Iberian Peninsula, is renowned as one of the most beautiful. The upper levels of the Alcázar are still used by the royal family as their official residence in Seville, and are administered by the Patrimonio Nacional. It was registered in 1987 by UNESCO as a World Heritage Site.
The original nucleus of the Alcázar was constructed in the 10th century as the palace of the Muslim governor. Built and rebuilt from the early Middle Ages right up to our times, it consists of a group of palatial buildings and extensive gardens. The Alcázar embraces a rare compendium of cultures where areas of the original Almohad palace - such as the 'Patio del Yeso' or the 'Jardines del Crucero' - coexist with the Palacio de Pedro I representing Spanish Mudejar art, together with other constructions displaying every cultural style from the Renaissance to the Neoclassical.
Some gardens have Renaissance statues. After damage by the 1755 Lisbon earthquake, that façade of the Palacio Gótico overlooking the Patio del Crucero was completely renovated in Baroque style.
References:The Citadelle of Quebec is an active military installation and official residence of both the Canadian monarch and the Governor General of Canada. It is located atop Cap Diamant, adjoining the Plains of Abraham in Quebec City. The citadel is the oldest military building in Canada, and forms part of the fortifications of Quebec City, which is one of only two cities in North America still surrounded by fortifications, the other being Campeche, Mexico.
The first fortifications in Quebec were built by the Governor General of New France Louis de Buade, and completed just in time for the Battle of Quebec in 1690.
After the British conquest in the second half of the 18th century, the problem of Quebec City's defences grew more acute.