Between 1350 and 1360 Ortolf von Trier, a knight of the Teutonic Order and the Komtur of Elbląg, founded a fort in Galindia, probably near an Old Prussian settlement. The first mentioning of the fort was a document from 24 September 1360, after Ortolf invited Masoviancolonists, among whom the settlement became known as Szczytno. The first custodian of the settlement was Heinrich Murer. In 1370 the wooden fort was destroyed byLithuanians led by Kęstutis, after which it was rebuilt using stone. The name Ortulfsburg gradually changed into Ortelsburg. The settlement grew in size owing to its location on a trade route from Warsaw to Königsberg (now Kaliningrad).
The castle was occupied by Polish troops during the Thirteen Years' War. With its inclusion in the Duchy of Prussia in 1525, it lost its importance as a border fortress and began to decline. Margrave and regent George Frederick (1577–1603), who enjoyed hunting nearby, began the redevelopment of the area. Among his projects was the rebuilding of the castle into a hunting lodge.
Ortelsburg became the seat of Landkreis Ortelsburg, one of the largest in East Prussia, in 1818 after Prussian administrative reforms, with Ritter von Berg chosen as the first district administrator. It was almost completely destroyed on 30 August 1914 at the beginning of World War I by troops of the Russian Empire, with 160 houses and 321 commercial buildings burning down.
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.