Wörthersee
...that in the 19th century the Wörthersee became an exclusive summer retreat for Vienna's nobility?
...that in the <a href="./19th_century" id="mwAlc" rel="mw:WikiLink" title="19th century">19th century</a> the <b id="mwAlg"><a href="./Wörthersee" id="mwAlk" rel="mw:WikiLink" title="Wörthersee">Wörthersee</a></b> became an exclusive summer retreat for <a href="./Vienna" id="mwAlo" rel="mw:WikiLink" title="Vienna">Vienna</a>'s <a href="./Nobility" id="mwAls" rel="mw:WikiLink" title="Nobility">nobility</a>?