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:Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.