The 1901 neo-baroque Neuer Marstall by Ernst von Ihne once sheltered royal horses and carriages. In 1918, revolutionaries hatched plans to topple the Prussian monarchy here; a GDR-era bronze relief on the (north) facade facing Schlossplatz shows Karl Liebknecht proclaiming a German socialist republic from the Berlin City Palace that same year. The building now hosts concerts of the Hochschule für Musik Hanns Eisler , a prestigious music academy.
