Nynäs Castle

The origins of the estate date back to the 14th century, when it was already a manor, owned by figures such as the Lord High Constable Bo Jonsson Grip. The current main building was likely constructed around 1650 under Erik Gyllenstierna. The castle acquired its present external appearance around 1860, when it was owned by Stockholm city councilor Johan August Gripenstedt. The last private owner, Baron Johan Gripenstedt, sold the estate in 1984 to the Province of Södermanlands län, while the inventory was acquired by the state art museums.

Nynäs Castle is accessible to visitors and can be toured during the summer half of the year. The fields belonging to the estate are cultivated by a provincial agricultural school. The stucco ceiling on the middle floor of the main building is noteworthy, which originally housed administrative offices and staff quarters on the ground floor, a state floor on the middle level, and guest rooms on the upper floor.