The antonyms for the word "art gathering" would be "art dispersal" or "art scattering." These terms indicate the opposite of gathering, which means to spread out, disperse or distribute something. In the context of art, dispersal or scattering could refer to pieces of artwork being sold, donated, or spread out in different exhibits or collections. While art gathering often denotes a positive connotation of bringing people together to appreciate and celebrate different forms of art, art dispersal may connote a sense of loss or separation, as valuable pieces of artwork may move away from a central location or community.