The "Fürstenhaus" at Platz der Demokratie was the first parliament building in Weimar, established in the 1770s. Today it is in use by the Weimar School of Music. The "Green Castle" next to the Fürstenhaus was built in the 1560s in Renaissance style and hosts today the Duchess Anna Amalia Library. The "Yellow Castle" at Grüner Markt was built in 1703 and is the municipal library today. The neighbouring "Red Castle" is also part of the library and was built in the 1570s. The "Wittumspalais" is a smaller widow mansion near Theaterplatz, established in 1768. Outbildings of the ducal residence are the "Husarenstall" (1770), the later residence of Charlotte von Stein at Ackerwand street, the "Marstall" (1870s) at Kegelplatz, today used as Thuringian State Archive and the "Reithaus" (1710s) within the "Park an der Ilm".