Artworlds are complex esthetic entities that include artistic processes and products, but their esthetic effects are somehow always beyond their appearances. Artworlds are not objects to be exhibited, not performances to be seen, not texts to be read, not research or experiments, not immaterial art, but they can be all of these and more. They don't have a sharp and clear presence, they cannot be presented as events or finalized and condensed as products. They can take different forms in different contexts and still they maintain their internal chaotic coherence of a world. They are artworks as artworlds.