The phrase "art announced" can be substituted with a variety of synonyms, each with their own nuances and connotations. For example, you could use "art unveiled" to express the idea that a work of art has been revealed to the public for the first time. Alternatively, "art publicized" suggests that the artwork was promoted or advertised in some way. "Art declared" implies that the artwork has been officially recognized or acknowledged, while "art revealed" might suggest a sense of discovery or revelation. Other possible synonyms for "art announced" include "art debuted," "art premiered," and "art showcased." Ultimately, the choice of synonym will depend on the specific context and intended meaning of the writer or speaker.