Catterino Cavos
...that the first performance of Glinka's opera A Life for the Tsar (1836) was conducted by Catterino Cavos, who composed an opera on the same subject 20 years before Glinka?
...that the first performance of <a class="mw-disambig" href="./Glinka" id="mwB1M" rel="mw:WikiLink" title="Glinka">Glinka</a>'s opera <i id="mwB1Q"><a href="./A_Life_for_the_Tsar" id="mwB1U" rel="mw:WikiLink" title="A Life for the Tsar">A Life for the Tsar</a></i> (<a href="./1836" id="mwB1Y" rel="mw:WikiLink" title="1836">1836</a>) was conducted by <b id="mwB1c"><a href="./Catterino_Cavos" id="mwB1g" rel="mw:WikiLink" title="Catterino Cavos">Catterino Cavos</a></b>, who composed an opera on the same subject 20 years before Glinka?