Beaux Arts Architecture in the Spotlight ( A title from an ACT test passage)
Based on Collins Dic, art is plural:
- N-VAR Thearts are activities such as music, painting, literature, film, and dance, which people can take part in for enjoyment, or to create works that express certain meanings or ideas of beauty
- N-PLURAL At a university or college, arts are subjects such as history, literature, or languages in contrast to scientific subjects.
- N-COUNT If you describe an activity as an art, you mean that it requires skill and that people learn to do it by instinct or experience, rather than by learning facts or rules.
I don't think the "Beaux Arts" fit into any of these category, but rather one type of genre. So why plural is used here?