When: Sat., June 10, 8 p.m., Wed., June 14, 8 p.m., Fri., June 16, 8 p.m., Sun., June 18, 7 p.m., Thu., June 22, 8 p.m. and Sat., June 24, 1 p.m. 2017

Mozart's late opera La clemenza di Tito, now known as Titus, was commissioned to assuage the fears of both the nobility and the peasants of Bohemia following the French Revolution. It tells of the great mercy of Tito, the new emperor of Rome. Vitellia, daughter of the emperor deposed by Tito’s father, wants revenge. She plots to kill Tito, and enlists his own friend Sesto as assassin. But Vitellia also has designs on being empress; if Tito were to choose her as his new wife, all her fury would dissipate. Instead he selects Vitellia's sister, and so Vitelli sets her murderous plan into action. What she hasn't counted on is Tito's own belief that a ruler should be both merciful and just — even against his own would-be assassin. Opera Theatre of St. Louis closes its current season with Titus, at the special request of OTSL music director Stephen Lord. This will mark Lord's final outing with the company he helped establish, and the principal singers are all his former mentees. Titus is performed at 8 p.m. Saturday, June 10, at the Loretto-Hilton Center (130 Edgar Road; www.opera-stl.org), and is performed five more times in repertory through June 24. Tickets are $25 to $135.

Paul Friswold

Price: $25-$135