Haus Blumenthal, Water castle in Brachelen, Germany.

Haus Blumenthal is the remnant of a former rectangular water castle at the entrance to Brachelen. On the northwest side stands part of the two-story manor house with stone-framed windows from the mid-16th century. Adjacent in the northeast corner is the two-story hall building of 1658, whose tall windows have stone frames topped by flat gables with pinecone finials. A small basket-arched portal with a gable relief provides access to the hall.

The castle was first documented in 1452 under Karl von Honseler and passed to Johann von Blumenthal in 1542, who gained noble status from Emperor Charles V. This early history reflects the changing ownership and growing importance of the estate over subsequent centuries.

The name refers to the Blumenthal family, whose influence shaped the estate from the 16th century onward. The building displays architectural details in its portals and large windows that reflect different periods, visible to visitors as they walk around the property.

Haus Blumenthal stands at the entrance to Brachelen on the road from Hilfarth, so it is seen from the street rather than visited. The surviving northwest part of the manor house and the northeast hall building are best viewed from outside; the site is a ruin fragment, not a museum.

The hall building of 1658 has floors noticeably taller than those of the older manor house beside it. Its small basket-arched portal carries a gabled top, and each large stone-framed window is crowned with a flat gable tipped by a pine cone.