Weimar's castle (Stadtschloss) is a three-story building with a Neoclassical colonnade facing the River Ilm and is notable for its fine interior, including the staircase hall, the Great Hall, and the Falcon Gallery from 1803, as well as the Goethe Gallery. 

The castle also houses the Castle Museum (Schlossmuseum), home to the city's extensive art collections, including a fine collection of German art from the Middle Ages and the Renaissance periods. 

Other highlights include Italian and Dutch paintings of the 16th and 17th centuries, including works by Rubens, and art of the Goethe period.