The term that is not related to the Romantic Era is Concerto Grosso.
The Concerto Grosso is a form that was more prominent during the Baroque period, characterized by the interplay between a small group of instruments (the concertino) and the full orchestra (the ripieno). The other terms—Nocturne, Art Song, and Tone Poem—are all associated with the Romantic Era, as they reflect the emotional expressiveness and focus on individual experience that characterized the music of that time.
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