The antonyms for the phrase "art unoccupied" are numerous, and vary depending on the context of the statement. Some possible antonyms include "art engaged," "art busy," "art occupied," "art in use," "art filled," "art active," and "art employed." In general, any word that describes a space or a task that is full, occupied, or in use could be considered an opposite of "art unoccupied." This could include things like "art crowded," "art cluttered," "art bustling," and "art active." Ultimately, the antonym for "art unoccupied" depends on the situation and the specific word being used.