The pale yellow palace across the river houses the mayor's offices, but the Marble Hall is one of Europe's most beautiful concert venues — Mozart performed here as a child, and small chamber concerts are still held most evenings.
The formal gardens, laid out in 1690 by Fischer von Erlach, are open to the public and free. The Pegasus fountain, the steps with the dwarf statues, and the rose garden all featured in The Sound of Music's "Do-Re-Mi" sequence.