The
castle was built in the
Baroque style between 1654 and 1676 by the wealthy military commander
count Carl Gustaf Wrangel on a peninsula of Lake
Mälaren between
Stockholm and
Uppsala. It was designed mainly by architect , and other architects involved were
Jean de la Vallée and
Nicodemus Tessin the Elder. It is probable, that castle was built based on
Ujazdów Castle in
Warsaw, Poland. The castle is a monument to the Swedish
Age of Greatness, a period in the middle of the 17th century when Sweden expanded to become one of the major powers in Europe. The death of Wrangel in 1676 meant that the castle was never truly completed. The
Brahe family who inherited the castle after Wrangel's death, had their own family castles and did not complete the interiors. Thus a large banqueting hall remains largely in the same condition as the builders left it in the summer of 1676. It is now called the Unfinished Hall. Skokloster Castle is the only building in Europe with a complete 17th-century building site of equal authenticity. Alongside the Unfinished Hall there are a number of other related items from the same period, as several hundred tools and about a dozen books on construction. The castle was converted into a permanent residence after the Second World War, when the von Essen family moved in. An apartment was built on the bottom floor with central heating, a modern bathroom and electricity. The upper floors were to be preserved as a museum. The renovation was carried out in two steps in 1947 and 1952, creating a modern living space inside the castle. In 1967, the von Essen family, who inherited the castle from Brahe when the family died out in 1930, sold the castle and its contents to the Swedish government; Skokloster Castle became a state museum and government agency named the
Royal Armoury and Skokloster Castle with the Hallwyl Museum Foundation (LSH). the family still resides in the vicinity. In the 1970s, architect Ove Hidemark renovated the castle by using the same materials and building techniques as in the 17th century, constituting a benchmark in Swedish conservation techniques. The interiors of the castle are thought to be especially well preserved, considering that it is without modern heating in a cold climate. A thorough renovation of the roof was undertaken with a second stage of the renovation commencing in March 2015, as the roof had leaked resulting in mold and damage especially to the paintings. ==Museum collections==