Schlossanlage, sog. Altes Schloss in Simmelsdorf, Architectural heritage monument in Simmelsdorf, Germany.

The Altes Schloss in Simmelsdorf is a former 14th-century water castle, rebuilt from 1830 to 1841 to a design by Leonhard Schmidtner. A stone ground floor carries a timber-framed upper storey under a tall half-hipped roof, with small towers at the corners and a polygonal staircase tower with a tent roof on the north side.

The so-called Altes Schloss began as a 14th-century water castle. From 1830 to 1841 it was rebuilt to a design by Leonhard Schmidtner, which gave it its present form. Since 1598 the complex has been owned by the patrician Tucher von Simmelsdorf family.

The castle belongs to the von Tucher family and shapes the town's character as a symbol of its past. Local people see it as part of their heritage and recognize it as a landmark of their everyday surroundings.

The complex is a listed building (D-5-74-158-1) in the centre of Simmelsdorf and has been owned by the Tucher family since 1598, so the interior is not open to the public. Visitors can view the stone ground floor, the timber-framed upper storey with its high half-hipped roof and the polygonal stair tower with tent roof from the street.

The complex blends features of a medieval defensive fortress with those of a comfortable manor house, a combination rarely seen in the region. This fusion shows how noble residents balanced protective needs with living comfort as times changed.