'Les Vepres Siciliennes'

'Les Vepres Siciliennes'

Bill Cooper/Royal Opera House via Bloomberg

Erwin Schrott, from left, Lianna Haroutounian, kneeling on the block, Michael Volle and Bryan Hymel in "Les Vepres Siciliennes" by Verdi. The Act 4 quartet is one of the highlights of the rarely-staged opera.