Altranft Manor, Noble residence in Altranft, Germany

Altranft Manor consists of a Baroque building of 1670 with a hipped roof and a three-winged extension added to the south in 1876-1878, giving the house its present shape. The northern front has seven axes, a three-axis central riser and an outdoor staircase before the entrance. The Baroque core keeps a barrel vault; the upper floor, once the estate family's private rooms, now holds museum rooms.

A noble seat at Altranft was first recorded in 1375 in Emperor Charles IV's Landbuch, held by the von Pfuel family; dendrochronology dates roof timbers to 1526. In 1664 Jacob von Pfuel sold it to Wolf Friedrich von Bomsdorf, who had the house rebuilt as a Baroque schloss between 1670 and 1678. From 1739 Samuel von Marschall, who pushed Friedrich II to drain the Oderbruch (1747–1762), owned it; in 1820 it passed to Count Wilhelm Werner Georg von Hacke, and in 1878 a two-winged addition gave the building its present form.

Since 1992 the manor has housed museum rooms of the Altranft Open-Air Museum; since 2016 it has been the seat of the Oderbruch Museum Altranft, a workshop for rural culture. The name Altranft goes back to the village first recorded in 1375, and the building is still called Schloss locally although it is a Herrenhaus. The park was probably laid out in the 1820s and has barely changed since a plan of 1861/1862.

The manor stands in Altranft, a district of Bad Freienwalde (Oder); the sources give no street name, so orient by the village centre and the adjoining open-air museum grounds. The baroque north front with its three-axis central riser and outside staircase faces the park meadow to the west. The upper floor holds the museum rooms; the historic floor was destroyed by water damage and not restored.

Dendrochronological dating of timbers in the northern part of the house yielded wood from 1526, confirming the age of the core building and its barrel vault. The 1724 single-storey annex was demolished in 1878 under Edwin Graf von Hacke and replaced by the two side wings that give the house its present outline.