The area of the Baroque buildings is almost 400 metres (1,300 ft) long and surrounds the old Renaissance palace.
In 1703, John Ernst, Count of Nassau-Weilburg, commissioned builder Julius Ludwig Rothweil to expand the palace.
He built the Obere Orangerie ("Upper Orangery") from 1703 to 1705.
It is a broad, curving corridor connecting to the south side of the Renaissance palace.
A combination of conservatory and ballroom, it has large windows on the inner, eastern side of the curve and trompe-l'œil tiles on the walls.

In the south, the Untere Orangerie was added from 1711 to 1713.
It is rectangular and followed the model of the Versailles Orangerie.
The roof terrace gives a view of the Lahn valley and the parterre garden in front.
The Baroque parterre was re-landscaped in the 19th century but rebuilt from 1936 to 1939 according to the original Baroque plans.

At the south end of the Obere Orangerie, the town hall (Rathaus) and church (Schlosskirche) were built, and the garden terraces (Schlossgarten) were installed.
In the west, the new Rentkammer and Kanzlei were built for the administration of the county.
The area of the Baroque buildings is almost 400 metres (1,300 ft) long and surrounds the old Renaissance palace. In 1703, John Ernst, Count of Nassau-Weilburg, commissioned builder Julius Ludwig Rothweil to expand the palace. He built the Obere Orangerie ("Upper Orangery") from 1703 to 1705. It is a broad, curving corridor connecting to the south side of the Renaissance palace. A combination of conservatory and ballroom, it has large windows on the inner, eastern side of the curve and trompe-l'œil tiles on the walls.
In the south, the Untere Orangerie was added from 1711 to 1713. It is rectangular and followed the model of the Versailles Orangerie. The roof terrace gives a view of the Lahn valley and the parterre garden in front. The Baroque parterre was re-landscaped in the 19th century but rebuilt from 1936 to 1939 according to the original Baroque plans. 
At the south end of the Obere Orangerie, the town hall (Rathaus) and church (Schlosskirche) were built, and the garden terraces (Schlossgarten) were installed. In the west, the new Rentkammer and Kanzlei were built for the administration of the county.
Schloss Weilburg