The first mention of 'Korsør' dates from 1241, and it is from this period that the medieval tower dates. The tower - part of a complex of buildings that constituted Korsør Castle - was demolished in the early 1800s.
The Great Magazine was constructed by order of Christian IV around 1610. On the first floor Korsør Town and Crossing Museum can be found. On the ground floor function as Korsør Town’s exhibition and event centre, while the basement and top floors serve as storage for the Museum’s extensive collections.
The Local History Archives for Korsør and Environs are located in the 'Commandants Residence' – a wood-faced, half-timbered building from the 1720s - as well as the adjoining harbourmasters residence dating from 1884.
The red-painted half-timbered house across from the tower dates from 1826, and was originally built for the storage of gun carriages. The building has, over the years, served variously as a youth hostel and a museum. Today it is the meeting place of the Marine Society as well as housing their historic collection.
The small guardhouse from the mid 19th century serves as a coffee house in the summer time. The ramparts surrounding the fortress area were constructed by order of the Swedish, during their occupation of Korsør from 1658-60.The fortress area bears the marks of many different historical periods, making it a site of unique historical interest.
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.