Elza van den Heever sings Leonore in a concert presentation of Beethoven’s Fidelio this summer at Caramoor. The performance takes place on July 31 at Caramoor’s outdoor venue, the Venetian Theater, and is a highlight of the festival’s season. The cast also includes Paul Groves (Florestan); Georgia Jarman (Marzelline); Kristinn Sigmundsson (Rocco); Andrew Owens (Jaquino); and Alfred Walker (Don Pizarro). Pablo Heras-Casado leads the Orchestra of St. Luke’s for this not-to-be-missed performance.