Konradsberg was one of Sweden's first psychiatric hospitals and was built 1855-1871[1] after designs by the architect Albert Törnqvist.

The building had a castle-like appearance and was quickly given the nickname Dårarnas Slott (Lunatic Castle).

In the 1850s, a comprehensive debate had risen where several significant doctors, including Magnus Huss, demanded Stockholm to improve the conditions for the patients.

There was already a psychiatric hospital in Danviken which was in very poor condition with dark premises and moisture.

The name Konradsberg comes from Konrad Heijsman who owned a plot of land in the area in the 1770s.