"DomQuartier: The Heart of Salzburg's Archbishops Salzburg’s splendor took shape under the prince-archbishops who ruled here during the Holy Roman Empire. Their former center of power is now a collection of the city’s most important structures called the DomQuartier, with museums and galleries documenting Salzburg ’s golden age. Here among the lively squares are highlights like the baroque 17th-century Salzburg Cathedral and the 7th-century St. Peter’s Abbey—said to be the oldest in the German-speaking world. Browse the art collections of the archbishops in the Residenzgalerie and further explore their history in the state rooms of the Alte Residenz (Old Palace) and in the Salzburg Museum in the Neue Residenz (New Palace)."