The remains of Midea, a Bronze Age citadel, stand above the village of the same name in the Argolid. The citadel is one of the largest and best preserved Mycenaean citadels. A tholos tomb and cemetery of chamber tombs at nearby Dendra is associated with the site. Midea was destroyed by Argos, probably at the same time as Tiryns, soon after the Greco-Persian Wars.
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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.