The remains of Roman military caste Dimum are located in the northern part of town of Belene. In the 1st century AD Dimum was a very important point of the Roman province of Moesia. Even during the regime of the first Roman Emperor Augustus the fortress was the most north-eastern point and boundary of the Roman province of Moesia and the Thracian kingdom.
From the beginning of the 2nd until the end of 3rd century here was stationed military horse camp - part of the Roman army, which probably has built the fortress.The site was repeatedly studied by archaeologists. During excavations in 1989 was studied the fortification system of the caste and it was discovered preserved part of it that is long about 60 meters. In 1990 there was found the south tower of the western fortress gate - gate Pretoria. Among the findings are also walls of two buildings (one from the late antiquity and other from an earlier period) and floor of a medieval house.In a castle the archaeologists were found many objects and artifacts dating from different periods - early and late antiquity, early and late Middle Ages, the Ottoman period. Among the finds are a bronze statuette of the goddess Demeter (Isida), bronze ornaments and applications, glass bracelets, home tools and objects, copper coins and more.
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.