Lopera Castle is a big castle in the city center made up of irregular masonry. It has an irregular pentagonal base. The castle is defended by five towers, some of the towers are cylindrical and some others are prismatic. It has machicolated balconies, a defensive device to better guard entrances and some of the fortified towers.
There were Romans and Visigoth settlements until Lopera was conquered by the Muslims at the beginning of the 8th century. During the 9th and 10th centuries, the population moved to the current town where a small Muslim farmstead was created. During the 11th century, the farmstead was fortified as a defence against Castilian attacks.
Once Lopera was conquered by the Christians, King Ferdinand III relinquished it to the Order of Calatrava. The Order of Calatrava built the castle that exists today. This castle guaranteed an escape to river Guadalquivir.
In 1856, the castle was acquired by Alonso Valenzuela who turned it into public property.
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.