The De Geer mansion at the centre of Lövstabruk is one of the finest 18th-century manor houses in Sweden, rebuilt after the Russian raid of 1719 destroyed the original settlement. The De Geer family, Dutch industrialists who had made their fortune supplying cannon to the Swedish state, spared no expense in the reconstruction — the result was a formal baroque ensemble that turned a remote ironworks into something resembling a small palace complex.
The mansion contains one of the best-preserved 18th-century interiors in the country, including the original library with its full complement of books. Guided tours of the mansion and grounds are available in summer; check locally for current opening times. The formal gardens, the outbuildings, and the canal connecting the estate to the lake are part of the heritage walk through the village.