Poetic Form
Nocturne
From Latin nocturn: of the night. The musical nocturne (Field, Chopin) influenced the literary form; Symbolist poets cultivated it. The opposite of the aubade.
Definition
A poem evoking the mood, mystery, or beauty of night — typically meditative, melancholic, or romantically intense.
Example
Longfellow's 'Hymn to the Night': 'I heard the trailing garments of the Night / Sweep through her marble halls.'