owners and is, since 1995, owned and operated by Scana Steel Söderfors AB, a company with production in Norway, Sweden and China. The first manor was finished in 1700, then rebuilt between 1749 and 1756 by architect Carl Hårleman for Claes Grill (I). After his death, the manor passed to his son Adolf Ulric. He was an avid naturalist and during his residence, he filled it with art and specimens of mounted animals, minerals, fossils and plants. Adolph Ulric had a separate house built for his collection in 1786. He also started the construction of an English garden at Söderfors by the river Dalälven. Gustaf af Sillén completed the park, which is one of the main features in Söderfors. , the manor is a hotel and conference venue. On 20December 1985, most of the ironworks and the surrounding area of Söderfors, a total of 91 buildings, became listed buildings, making it one of the largest listed sites in Sweden. Österbybruk The ironworks at Österbybruk was established by King Gustav I of Sweden with the help of German experts during the 16th century and specialised in making munitions. During the 17th century, the factories were merged with Lövsta and Gimo, under the directions of Louis De Geer, making it the second-largest ironworks in Sweden. Since De Geer recruited skilled ironworkers from the Walloon Region of Belgium, these ironworks became known as the Walloon factories ("Wallonbruken"). The iron ore processed in Österby came from the Dannemora mine and was noted for its purity. Iron bars produced at these ironworks were stamped with a "Double Bullet" mark, which guaranteed high and consistent quality. Such iron became reputable in England, where it was used by the steel industry in Sheffield. In 1758, the ironworks was sold to the Grill Trading house, at that time owned by Claes (I) and Johan Abraham. The trading house was discontinued with the death of Johan Abraham in 1799, and the ironworks was sold to Anna Johanna (III), the wife of Adolf Ulric. The factory passed through several owners until it was closed in 1983. In 1763, Claes (I) started construction of the mansion at Österbybruk. The mansion incorporated the two wings already built in the 1730s; the west wing which served as housing for one of the ironworks caretakers and the east wing containing a chapel. The mansion was not completed until 1780, due to the decline of