The present main building, called Neues Schloss (New Palace), was built in the 19th century in Neo-Renaissance style, burnt down in 1945, and after decades as a ruin, was reconstructed until 2013.

Muskau Park is the largest and one of the most famous English landscape gardens in Central Europe, stretching along both sides of the German–Polish border on the Lusatian Neisse.

Pückler reconstructed the medieval fortress as the "New Castle", the compositional centre of the park, with a network of paths radiating from it and a pleasure ground influenced by the ideas of Humphry Repton, whose son John Adey worked at Muskau from 1822 on.

The next year it was acquired by Prince Frederick of the Netherlands, who employed Eduard Petzold, Pückler's disciple and a well-known landscape gardener, to complete his design.

Upon his death in 1881, he was succeeded by his daughter Princess Marie, who sold the estates to the Count von Arnim.