Gradually other patricians and plebeians are attracted by the tumult,
among the latter, Rienzi. When he becomes aware of the insult offered
his sister, he takes counsel with the Cardinal Raimondo, and they
agree to rouse the people in resistance to the outrages of the nobles.
Adriano is placed in an embarrassing position,--his relationship to
the Colonnas urging him to join the nobles, and his love for Irene
impelling him with still stronger force to make common cause with the
people. He finally decides to follow Rienzi, just as the trumpets are
heard calling the people to arms and Rienzi clad in full armor makes
his appearance to lead them.

The struggle is a short one. The nobles are overcome, and in the
second act they appear at the Capitol to acknowledge their submission
to Rienzi: but Adriano, who has been among them, warns Rienzi that
they have plotted to kill him. Festal dances, processions, and
gladiatorial combats follow, in the midst of which Orsini rushes at
Rienzi and strikes at him with his dagger. Rienzi is saved by a steel
breastplate under his robes. The nobles are at once seized and
condemned to death. Adriano pleads with Rienzi to spare his father,
and moved by his eloquence he renews the offer of pardon if they will
swear submission. They take the oath only to violate it. The people
rise and demand their extermination. Rienzi once more draws the sword,
and Adriano in vain appeals to him to avert the slaughter. He is again
successful, and on his return announces to Adriano that the Colonnas
and Orsinis are no more. The latter warns him of coming revenge, and
the act closes with the coronation of Rienzi.

The fourth act opens at night near the church. The popular tide has
now turned against Rienzi, upon the report that he is in league with
the German Emperor to restore the pontiff. A festive cortége