Gunderslevholm is a manor house and estate located 12 km northwest of Næstved in southeastern Denmark.

It was originally a Baroque-style mansion built in 1729 for Carl Adolph von Plessen but was in 1787 adapted to the Neoclassical style.

In the Middle Ages, Gunderslevholm was located in the village of Gunderslevmagle, The first known owner of the manor was Niels Pedersen.

[1] Jens Nielsen sold the estate to Johannes Mogensen Grubbe, a district judge of Zealand, in 1333.

Grubbe constructed a fortified house on the estate, but it was destroyed by king Valdemar IV's troops just a few years later.

other sources suggest that the castle may have been captured by the Holsteins and that Grubbe may have participated in the attempt to take it back.

Bent Biug Grubbe, who later became the sole owner of the estate, served as hofmeister for Olaf II of Denmark.

Reedtz' heir, Christian Rodsteen, a foster son, sold Gunderslevholm to Elisabeth Sophie von Holstein in 1707.

Elisabeth Sophie von Holstein sold Gunderslevholm to a court priest, Hector Gottfried Masius, who died shortly thereafter.

Carl Adolph von Plessen improved the living conditions for the peasants on his estates, e.g. through the construction of schools.