It lies some 12 kilometres east of European route E4, approximately halfway between Uppsala and Gävle.

[2] From this time, the castle also began to be used as a state prison, where for example the field marshal, Privy Council member and governor of Narva and Ivangorod Carl Henriksson Horn af Kanckas sat imprisoned after being condemned for treason.

[3] During the ownership of Gustaf Carlsson Banér, the castle was in the 1660s transformed into a Baroque palace.

[3][2] Another large-scale reconstruction took place in 1825–32, under the guidance of architect Carl Christoffer Gjörwell.

It is a square tower with a roof lantern, surrounded by a partially preserved stone wall with openings for cannon.

The Baroque part of the castle is a three-storey building built of brick.