The Castle of Biar stands on a hillock overlooking the town of Biar. During the Muslim rule had already news but few of the fortress, which began to be relevant to the time of James I of Aragon, remain as border castle under the Treaty of Almizra. The building lost its role during the early modern period and, although rarely used, after was used as a cemetery.
The castle was built in stone with masonry and rammed earth, which was used for the tower of homage. The building consists of two parts. On the one hand, a semicircular enclosure with four towers at the corners thereof, and on the other, a space with four cubic structures and the tower of homage. These towers and other structures are the basic defenses of the castle, and its position high on a rocky hill, the proliferation of small openings in its walls and battlements auction.
The tower of homage is the highlight of the architectural complex. Dating from the 12th century, the tower, situated on one side, was built with mortar mixture of sand and lime and reaches a height of 19 metres. Its plan is square shaped and has three floors, acquiring such an enormous importance. On the lower floor is used the called barrel vault and the other levels, second and third, use the Almohad ribbed vault which, together with those of the neighboring Castle of Villena, are among the oldest in Spain and throughout the Maghreb, as well as the only used in a military building in the Iberian Peninsula.
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.