Hisn Yakka is the name given to an old Muslim fortress and town, predecessors of the current city of Yecla. It was inhabited between the 11th and 13th centuries, as the town was abandoned after 1266 after the Mudejar revolt and the new Christian settlers settled on the opposite side of the mountain.
Hisn Yakka was built at the end of the 11th century in the Almoravid period, but it was not until the 12th century that the town or Madina appeared on the sunny side.
After the Christian conquest of the kingdom of Murcia, the Muslim population became a vassal of the King of Castile, which made the living conditions of the population more difficult, discontent that caused the Mudejar revolt. A large part of the Mudejar population had to leave the area at the end of this revolt, and it is likely that this was also the end of Yakka.
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.