Megara Hyblaea is an ancient Greek colony in Sicily It was founded about 728 BC by colonists from Megara in Attica. In 628 the city established a colony at Selinus but in 483 was destroyed by the Syracusan leader Gelon. The city had a brief independent existence in the 4th century BC, when it issued coinage, but is heard of mainly as a fortified place.
Excavations carried on in 1891 led to the discovery of the northern portion of the western town wall, which in one section served at the same time as an embankment against floods. There is also an extensive necropolis, about 1500 tombs of which have been explored, and of a deposit of votive objects from a temple. The harbour lay to the north of the town.
In the mid-seventh century, the city was organised according to a regularised plan. An agora emerged with stoas on its north and eastern sides. This is one of the earliest known agoras.
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.