Angelotti

Cavaradossi gives Angelotti a key to his villa, suggesting that he hide in a disused well in the garden.

He has been unable to find Angelotti, but has arrested Cavaradossi.

Nicassio, pp. 32–34 This republic was ruled by seven consuls ; in the opera this is the office formerly held by Angelotti, whose character may be based on the real-life consul Libero Angelucci.

Scarpia orders Spoletta and his agents to follow her, assuming she will lead them to Cavaradossi and Angelotti.

Scarpia questions the Sacristan, and his suspicions are aroused further when he learns that Cavaradossi has been in the church; Scarpia mistrusts the painter, and believes him complicit in Angelotti's escape.

The Sacristan identifies a likeness between the portrait and a blonde-haired woman who has been visiting the church recently (unknown to him, it is Angelotti's sister the Marchesa).

The sound of a cannon signals that Angelotti's escape has been discovered.

Tosca is told by Scarpia that she can save her lover from indescribable pain if she reveals Angelotti's hiding place.

When Spoletta brings news that Angelotti has killed himself, and that everything is in place for Cavaradossi's execution, Tosca, in despair, agrees to submit to Scarpia in return for Cavaradossi's freedom.