Mälsåker Castle — Baroque palace by Nicodemus Tessin the Elder on Selaön
Out on Selaön island by Lake Mälaren stands one of Sweden’s foremost Baroque castles, reshaped during the 17th century by Gustaf Soop and architect Nicodemus Tessin the Elder.
8 November 2026 · Current
Mälsåker Castle on eastern Selaön north of Stallarholmen has medieval origins but gained its grand Baroque form in the 1660s and 1670s when councillor Gustaf Soop commissioned architect Nicodemus Tessin the Elder.
From the Baroque era to World War II history
During the Second World War the castle was purchased by the Norwegian legation in Stockholm as a training base for Norwegian police troops. After a fire in January 1945 destroyed the roof, decades of restoration by the National Property Board and the Mälsåker Future Association rebuilt the Baroque roof in the 1990s.
Inside, visitors can trace three centuries of architectural history, from exposed brickwork to richly stuccoed Baroque ceilings on the state floor.
Castle park and summer tours on Selaön
The lakeside castle park is open for walks year-round, while summer brings guided tours, art exhibitions, concerts, and a castle café.
Read more at Föreningen Mälsåkers Framtid.