Schloss Johannstorf, Baroque château near Dassow, Germany.

Schloss Johannstorf is a two-story brick manor house near Dassow, with a classical facade framed by four pilasters and finished with a Mansard roof. The main building sits at the center of a broader estate that once included working farm structures arranged around it.

The present manor was built from 1743 for Schack von Buchwald (1705–1770), a Gottorf conference councillor and Lübeck cathedral canon, replacing a medieval moated castle; it was the last major work of architect Rudolph Matthias Dallin. The estate had belonged to the Buchwald family since the 16th century, and from the marriage of Margarete von Buchwald to Claus Schack the owners called themselves Schack von Buchwald. In 1782 it passed to the Eckermann family, who stayed until 1945; under the DDR it served as housing. A fire on 1 March 2025 severely damaged the house.

The pediment of the courtyard portal carries the von Buchwald coat of arms set inside the star of the Order of St Anne, framed by its motto Amantibus Iustitiam, Pietatem, Fidem. The family held the estate from the 16th century and took the name Schack von Buchwald after Margarete von Buchwald married Claus Schack.

The building is not open to visitors and is in need of restoration, so a walk around the outside of the estate is the only way to see it. Keep to the paths and respect the private property boundaries when observing the facade and surroundings.

The gatehouse with its portal turret has collapsed, and the surrounding farm buildings, courtyard and gatehouse are in ruins. The moat around the nearly square courtyard island has silted up through decades of neglect. The layout probably took Schloss Bothmer as its model, but only the manor house was ringed by water, without pavilion wings.