Starigrad Fortress was built during the Croatian–Ottoman wars (15th century) as a primary defence against the Ottoman Empire. The precipitous fortification is sited on a 262 m ridge above the town Omiš. In the event of attack, its purpose was to provide refuge for local people and be a stronghold where they could retreat to and resist the Turks.
As the stone fort's defensive strength is derived from the elevation at which it was built, it is a rudimentary defensive structure. A two-storey square tower stands at its highest point, serving as both a lookout post and keep. A simple bastion stands at the opposite end of the fort to cover the approach path and the ridge line. It has an outer barbican to defend the fort's narrow entrance gateway and the gorge below the fort. The walls, which are about 1 m thick, are made from locally quarried limestone. They enclose an inner bailey that is separated into two distinct levels by the difference in the site's natural rock height. Access between the levels is via a small stone stairway that was once protected by a stone wall and gateway. In event of attack, the fortification's design permits the defenders to fall back to higher ground as each level falls.
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.