The stone carvings of Val Camonica (Camonica Valley) constitute the largest collections of prehistoric petroglyphs in the world. The collection was recognized by Unesco in 1979 and was Italy's first recognized World Heritage Site. Unesco has formally recognized more than 140,000 figures and symbols, but new discoveries have increased the number of catalogued incisions to between 200,000 and 300,000. The petroglyphs are spread on all surfaces of the valley, but concentrated in the areas of Darfo Boario Terme, Capo di Ponte, Nadro, Cimbergo and Paspardo.
Many of the incisions were made over a time period of 8000 years preceding the Iron Age (1st millennium BC), while petroglyphs of the last period are attributed to the people of Camunni, mentioned by Latin sources. The petroglyph tradition does not end abruptly. Engravings have been identified (although in very small number; not comparable with the great prehistoric activity) from the Roman period, medieval period and are possibly even contemporary, up to the 19th century. Most of the cuts have been made using the 'martellina' technique and lesser numbers obtained through graffiti.
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.