WHAT ARE WE TO MAKE OF Virgil Thomson's impish opera Four Saints in Three Acts? Composed to a nonsense text by Gertrude Stein, originally sung by a mostly amateur all-black cast and set against a 15,000-sq.-ft. cyclorama backdrop made of cellophane, the work was a sensation at its Hartford, Connecticut, premiere in February 1934 and quickly moved to Broadway for a six-week run. Ever since, music lovers have been debating what, if anything, it means. "Pigeons, on the grass alas," indeed.
To the rescue has come Robert Wilson, the avant-garde theater artist whose gorgeous new staging of Four Saints at the...