sixth and final mass
... that Franz Schubert's sixth and final mass was not performed until October 1829, almost a full year after his death?
... that <a href="./Franz_Schubert" id="mwJQ" rel="mw:WikiLink" title="Franz Schubert">Franz Schubert</a>'s <b id="mwJg"><a href="./Mass_No._6_(Schubert)" id="mwJw" rel="mw:WikiLink" title="Mass No. 6 (Schubert)">sixth and final mass</a></b> was not performed until October 1829, almost a full year after his death?