The Citadel of Soimos was built after the first invasion of the Tatars and documented since 1278. Soimos Citadel is on the list of historical monuments. From 1278 until 1509, the city was ruled by Ladislau Kan II and Iancu of Hunedoara. In 1509 the citadel and the domain become the property of Gheorghe Hohenzollern of Brandenburg. It was besieged in 1514 by Romanian and Hungarian rebels, led by Gheorghe Doja. After a brief resistance, the garrison of citadel led by Prince of Ciuci is an uprising against people of Gheorghe Hohenzollern and joins the rebels. Turks occupied the citadel in 1552, after repeated sieges, and in 1595 was recaptured by György Borbély - Captain of Stephen Bathory - reaching into custody rulers of Transylvania. In 1599-1600 pass under the rule of Michael the Brave (Mihai Viteazul). The citadel was finally liberated from Turkish domination in 1688. http://www.uvisitromania.com/tourist-attractions/arad/soimos-citadel-id535

The Alcazaba, with its 1430 m. walled perimeter is Spain’s second-largest Muslim construction, after the Alhambra Palace in Granada. It was built at the behest of Abderrahman III in the tenth century after the founding of the city. It is a stronghold which housed three campuses; the first two Muslims and one Christian, last built after the conquest of the city by the Catholic Monarchs, which occurred in 1489. The fortress is situated on a hill, overlooking the old centre of the city, the medina. In it, we find a first enclosure where there is a large garden and ponds constructed during the Muslim period. The second area, the vast palatial residence of King Almotacín, stood during the eleventh century. This consisted of a public area, where today are the caliphate wells of the tenth century, a Christian arch of the 16th century. Finally, is the last enclosure of the fortress, Christian, and ordered to be built by the Catholic Monarchs, after the taking of the city. It is a Christian castle within the Muslim fortification. https://www.turismodealmeria.org/en/motivo-tematico/the-alcazaba-fortress/

This building was the royal residence of the Christian monarchs and subsequently the site of the Courts of the Holy Offices, a civil prison, and finally a military prison. It is set among magnificent gardens, including the garden known as the Avenue of the Monarchs which features statues of all the monarchs who had connections with the palace-fortress. It was declared a Historical Monument in 1931. The building is also part of the area declared a World Heritage site by UNESCO in 1994. Since 1986, its gardens have been protected by town planning laws. It stands on top of the remains of the former caliph's palace. http://www.spain.info/en_IN/que-quieres/arte/monumentos/cordoba/alcazar_de_los_reyes_cristianos.html