The ancient Agora of Argos started to be organized during the 5th century BC. in the south of the city, on the crossroads from the Heraion of Argos, Corinth and Tegea. The architectural programme was completed at the end of the 4th century BC. During the Classical and the Hellenistic periods, the Agora was surrounded by porticos and buildings which can hardly be distinguished at present under the later architectural phases.
During the Roman times, many of the existing buildings were altered in shape and function, mostly into shops and fountains when, in the 2d and 3d century A.D. a general remodeling of the site took place. Later, during the 4th century A.D., a last monument of Paganism was built, a hearth surrounded by boundary steles from the enclosure (peribolos) of an 'heroon' of the Archaic period dedicated to the 'Seven against Thebes'. The invasion of the Goths, in 395-396 A.D. accelerated the destruction and the disappearance of the monuments of the Agora.
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.