Note to As You Like It, 3.2.2: "thrice-crowned queen of night"

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As You Like It,
Act 3, Scene 2, line 2.

thrice-crowned queen of night: i.e., the goddess associated with the moon in classical mythology. —In the heavens she is Cynthia; on earth, Diana; and in the underworld, Proserpina. Hence she is "thrice-crowned." She is also the protecter of chastity, and so Orlando's appeal to her emphasizes the purity of his love for Rosalind.