Anthony Roth Costanzo, of Opera Philadelphia, right, performs with Peter Richard Conte, Wanamaker grand court organist, at the storied Wanamaker Building, July 24, 2025, in Philadelphia.

But countertenor Anthony Roth Costanzo, the avant-garde opera star hired last year to run Opera Philadelphia, is leading an effort to let the public again enjoy the Wanamaker Organ, a National ...