Gut Rundhof, Manor house in Stangheck, Germany.

Gut Rundhof is a Baroque manor house built 1753–1755 in Stangheck near Gelting. The eleven-axis brick building has two full storeys over a low cellar and is so deep that two parallel roofs span it, following the regional double-house tradition. A polygonal risalit crowned by a vase-decorated attic projects on the courtyard side; the house stands on an island of pond-like moats, flanked by two 18th-century cavalier buildings around a cour d'honneur.

Rundhof is first recorded in 1231 in King Valdemar II's land register as a royal water castle, held as a fief by Jutish commanders during the 13th century. Around 1400 Erich Krummediek turned it into a large landed estate; after Duke Adolf VIII of Holstein took Flensburg in 1431 the castle was demolished. Henneke von Rumohr gained the estate in 1557 through his wife Eybe Sehestedt, and his descendants, now in the 16th generation, still hold it. The Baroque manor house was built 1753–1755 to plans by Johann Gottfried Rosenberg, executed by Georg Greggenhofer, and remodelled in Neoclassical style 1785–1790.

The manor displays northern German building traditions with its distinctive square footprint and roof forms that define Schleswig-Holstein estates. Visitors immediately notice the regional character in the proportions and careful layout of the courtyard complex.

The manor house can only be viewed from the outside, from the public paths that pass the estate; the grounds and the landscape garden are private. The former administrator's house is let to holiday guests. Occasional concerts take place in the domed hall of the vestibule.

The house is eleven bays wide and so deep that two parallel roofs cover it, following the regional double-house tradition. Its first major work in the duchies was by Georg Greggenhofer, who came from Bavaria and later became Eutin's court master builder.