The Triptych "Suor Angelica (Sister Angelica)"

The opera opens with scenes showing typical aspects of life in the convent — all the sisters sing hymns, the Monitor scolds two lay-sisters, everyone gathers for recreation in the courtyard. The sisters rejoice because, as the Mistress of Novices explains, this is the first of three evenings that occur each year when the setting sun strikes the fountain so as to turn its water golden. This event causes the sisters to remember Bianca Rosa, a sister who has died. Sister Genevieve suggests they pour some of the "golden" water onto her tomb.