Volker Wangenheim
... that conductor Volker Wangenheim opened the Beethovenhalle in Bonn for music by Karlheinz Stockhausen on 15 November 1969, including the world premiere of Fresco for four orchestral groups?
... that conductor <b id="mwCZU"><a href="./Volker_Wangenheim" id="mwCZY" rel="mw:WikiLink" title="Volker Wangenheim">Volker Wangenheim</a></b> opened the <a href="./Beethovenhalle" id="mwCZc" rel="mw:WikiLink" title="Beethovenhalle">Beethovenhalle</a> in <a href="./Bonn" id="mwCZg" rel="mw:WikiLink" title="Bonn">Bonn</a> for music by <a href="./Karlheinz_Stockhausen" id="mwCZk" rel="mw:WikiLink" title="Karlheinz Stockhausen">Karlheinz Stockhausen</a> on 15 November 1969, including the world premiere of <i id="mwCZo"><a href="./Fresco_(Stockhausen)" id="mwCZs" rel="mw:WikiLink" title="Fresco (Stockhausen)">Fresco</a></i> for four orchestral groups?