Aracena Castle was erected in the 13th century, during the Islamic period, and was itself built on the site of an ancient Moorish castle. The walled enclosure was partitioned inside, with the tower of homage, or castle keep, defending the barrier that divided its interior. The population of Aracena settled around this structure, giving rise to the current urban landscape. During the late Middle and Modern Ages, Aracena continued growing from the Cerro del Castillo (castle hill) into the valley, first as unattached land dependent on Seville and later, in the seventeenth century, as a feudal estate under the jurisdiction of the Count-Duke of Olivares. Still later, it was under the Count of Altamira, who carried the title of Prince of Aracena.
The fortress consists of the alcazaba, or citadel, with its watch tower, cistern and walls; these are flanked by other towers, as well as a fence line that, in its interior, once accommodated medieval living quarters.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.