Ruth Siewert
... that contralto Ruth Siewert appeared as Erda not only in Bayreuth, but also at La Scala, La Fenice, and La Monnaie?
... that contralto <b id="mw4A"><a href="./Ruth_Siewert" id="mw4Q" rel="mw:WikiLink" title="Ruth Siewert">Ruth Siewert</a></b> appeared as <a href="./Der_Ring_des_Nibelungen" id="mw4g" rel="mw:WikiLink" title="Der Ring des Nibelungen">Erda</a> not only <a href="./Bayreuth_Festival" id="mw4w" rel="mw:WikiLink" title="Bayreuth Festival">in Bayreuth</a>, but also at <a href="./La_Scala" id="mw5A" rel="mw:WikiLink" title="La Scala">La Scala</a>, <a href="./La_Fenice" id="mw5Q" rel="mw:WikiLink" title="La Fenice">La Fenice</a>, and <a href="./La_Monnaie" id="mw5g" rel="mw:WikiLink" title="La Monnaie">La Monnaie</a>?