[2] The building was originally constructed in the years 1648–1650 for Count Lennart Torstenson,[3] but was bought by Karl X Gustav in September 1657[4] and served as his residence during the 1658 and 1660 sessions of the Riksdag of the Estates (Swedish Parliament), which were held in Gothenburg.

[9] General Count Lennart Torstensson was appointed Governor-General of Västergötland, Dal, Värmland and Halland on 31 May 1648, and his instructions stipulated that his "ordinary residence" be located in Gothenburg.

Torstensson hired Casper Wolter, a German builder living in Stockholm, to construct a house on the plot, and the work was completed within two years.

[10] Torstensson died on 7 April 1651 in Stockholm, and six years later King Karl X Gustav purchased the count's newly completed Gothenburg palace from his widow, Countess Beata de la Gardie.

[13] In connection with the rebuilding of corner rooms on the ground floor in 1964–1965, roof boards with paintings from the 17th century were discovered, which have been renovated.