This lavish palace in the pedestrian zone at the center of the old town was the "downtown" home of the Salzburg prince-archbishops after they no longer needed the protection of cheerless Hohensalzburg Fortress. The Residenz dates from 1120, but the baroque rebuilding was originally ordered by Archbishop Wolfgang (usually called "Wolf") Dietrich at the end of the 16th century. The Residenz fountain, from the 17th century, is one of the largest and most impressive baroque fountains north of the Alps. If these walls could speak, they'd tell of young Mozart, who often played here in the Conference Room, and Emperor Franz Josef, who received Napoleon III here in 1867. More than a dozen state rooms, each richly decorated, are open to the public. On the second floor, you can visit the Residenzgalerie Salzburg, an art gallery founded in 1923, which now contains European paintings from the 16th to the 19th century, displayed in 15 historic rooms. Paintings from the Dutch, Flemish, French, Italian, Austrian baroque, and Austrian 19th-century schools are all exhibited, including striking pieces like "The Last Judgement" by Hieronymus Francken the Younger. Self-guided audio tours of the state rooms are included in the admission, and visitors should plan on around an hour to see the rooms and gallery.