An interrogation in act two is juxtaposed with music offstage from a concert in which the heroine is singing, while the act one finale, featuring spoken text and bells, is a Te Deum.  
This opera begins with a four-chord leitmotif that recurs throughout, even after the character it signifies has been killed. Another recurring musical theme, sung by a tenor in one of its iterations, accompanies the suicide of the title character. An interrogation in act two is juxtaposed with music offstage from a concert in which the heroine is singing, while the act one finale, featuring spoken text and bells, is a Te Deum.  For ten points, name this opera featuring the arias "Recondita armonia" and "E lucevan le stelle," whose title character agrees to sleep with the police chief Scarpia to save her lover Cavaradossi, composed by Giacomo Puccini.
This opera begins with a four-chord leitmotif that recurs throughout, even after the character it signifies has been killed.
Tosca