Axur, re d'Ormus ("Axur, king of Ormus") is an operatic dramma tragicomico in five acts by Antonio Salieri. The libretto was by Lorenzo da Ponte.
Axur is the Italian version of Salieri's 1787 French-language work Tarare which had a libretto by Pierre-Augustin Caron de Beaumarchais.
Axur, King of the Persian Gulf kingdom of Ormus, orders one of his soldiers, Altamor, to abduct Aspasia. She's the wife of Atar, the heroic commander of Axur's army. Not knowing who kidnapped Aspasia but suspecting an overseas enemy, Atar speaks with the king and begs for justice. Moved by his appeal, Axur allows Atar to take a ship and seek his wife. Before Atar leaves, Axur's slave-servant, Biscroma, tells the general that the king has abducted Aspasia and hidden her in the royal harem. Enemy troops now threaten to invade Ormus, and the people plead with Atar to save them. Axur undermines Atar by telling the people that the general has better things to do than lead the army. Enraged, Atar declares himself ready to stand at the head of the army and wipe out the nation's enemies.
While a feast is being held prior to the battle, Biscroma disguises Atar as a Nubian and smuggles him into the harem. Axur discovers "the Nubian" in the harem, but does not realize who he is. Axur decides to marry Aspasia to the Nubian as punishment for being unfaithful to Atar. Axur then changes his mind, and instead sends a squad of soldiers into the harem to kill "the Nubian". The soldiers discover "the Nubian's" true identity. They decide not to kill Atar, because they only have orders to kill "the Nubian" and not the general of the army. But they have orders to arrest Atar, so they do so and bring him before the king. Atar is dragged into court as Axur is wooing Aspasia. The husband and wife embrace. Axur sentences Atar to death for violating the royal harem, and Atar is dragged off to the place of execution. But a crowd surrounds the palace and demands Atar's freedom so that he can save the nation. Axur, realizing he has lost the love of the people, removes his crown and commits suicide. The people proclaim Atar the new King of Ormus.