Schloss Sickendorf, Cultural heritage monument in Sickendorf, Lauterbach, Germany.

Schloss Sickendorf is a cultural heritage monument in Lauterbach with restored main buildings, scattered stone sculptures from earlier periods, and manicured park grounds. The property was reconstructed after fire damage and now contains structures from different architectural eras across its site.

A 15th-century Riedesel family fief stood here before a replacement building for Baron Albrecht Georg Karl Woldemar Riedesel burned down in 1882. The present castle was built between 1884 and 1887 to plans by architect Albert Petersen of Altona. The Sickendorf line of the Riedesel family later died out and the castle changed hands several times.

The Sickendorf line of the Riedesel family died out, after which the castle was sold several times; it has belonged to its current private owner since 2008 and is being gradually restored. In the park, a monument of rough tuff blocks with an Iron Cross, donated by hospital inmates at the end of the First World War, honours their hosts Gertrud and Albrecht Riedesel.

Schloss Sickendorf stands at Hofstraße 14 in the Sickendorf district, north of Lauterbach's centre, and the building and park are private property undergoing gradual renovation, so visits are limited to what is visible from outside. The 115,000-square-metre English-style park lies south of the estate.

A tuff-stone monument with an Iron Cross stands by the pond in the park, donated by hospital inmates at the end of World War I and dedicated to their hosts Gertrud and Albrecht Riedesel. The park itself, 115,000 square metres in English style, was laid out by the Siesmayer firm of Frankfurt at the same time as the castle.