Verse tragedy in five acts by Percy Bysshe Shelley, published in London in 1819 and first staged privately by the Shelley Society in 1886. Modeled after Shakespearean tragedy, it is noted for its powerful characters, evocative language, and moral ambiguities. It is based on an incident in Renaissance Rome. The story centers on Count Francesco Cenci, who is notorious for his depravity. He gives a party at which, to the horror of his guests, he gleefully announces the deaths of two of his sons. Another victim of his cruelty is his daughter Beatrice, whom he has raped. Beatrice enlists the help of Orsino, a priest and Roman nobleman whom she had once hoped to marry. With the approval of the Cenci family, Orsino plots the murder of the count. When the other conspirators are found out, Orsino evades capture; the rest are tried and executed.