Magnificat
... that Carl Philipp Emanuel Bach conducted his Magnificat decades after he composed it, juxtaposed in the concert to his father's Credo?
... that <a href="./Carl_Philipp_Emanuel_Bach" id="mwsg" rel="mw:WikiLink" title="Carl Philipp Emanuel Bach">Carl Philipp Emanuel Bach</a> conducted his <b id="mwsw"><a href="./Magnificat_(C._P._E._Bach)" id="mwtA" rel="mw:WikiLink" title="Magnificat (C. P. E. Bach)">Magnificat</a></b> decades after he composed it, juxtaposed in the concert to his father's <a href="./Mass_in_B_minor_structure#No._2_Symbolum_Nicenum" id="mwtQ" rel="mw:WikiLink" title="Mass in B minor structure">Credo</a>?