The house known as the Carlshäls Gård was built in 1837 by the manager of Långholmen Prison Carl Modeer as a quiet place to spend the later days of his life. He lived here with his wife and two cows until his death.

In 1876 the house was bought by Lars Ohlsson Smith, known as The King of Spirits (Brännvinskungen) and the “father” of Absolut Vodka.  His factory was located on a nearby Reimersholme island, and Långholmen was a perfect place for his summer residence. Smith added the western wing with a music and billiard saloon which was called the King of Spirits’ Hall. 

During the 20th century the place went through a lot of transformations. It was used as a mental hospital (1904), a home for Finnish war children (during World War II) and as a drug addicts ward (in 1970s). Now it is a banquet hall.