Adriano in Siria
... that the libretto Adriano in Siria by Metastasio was the basis for more than 60 operas?
... that the <a href="./Libretto" id="mwB1o" rel="mw:WikiLink" title="Libretto">libretto</a> <i id="mwB1s"><b id="mwB1w"><a href="./Adriano_in_Siria" id="mwB10" rel="mw:WikiLink" title="Adriano in Siria">Adriano in Siria</a></b></i> by <a class="mw-redirect" href="./Metastasio" id="mwB14" rel="mw:WikiLink" title="Metastasio">Metastasio</a> was the basis for more than 60 operas?