Some of the most zealous opera fans are the ones using the stage entrance. Recently, Latvian soprano Marina Rebeka stopped by the office of Lucy Lindquist at Lyric Opera of Chicago. Lindquist is wardrobe mistress; Rebeka was seeing about her costumes for Violetta, as the lead in Verdi’s La traviata. Rebeka recalls her jaw hitting the floor when she noticed the headpiece. Lindquist explained, “It was worn by Maria Callas