How about the human body as relational art? Is there anything more beautiful than the human form? I'm sure you're familiar with the biblical reference that humans were created in God's image.
Sorry, that is decorational. I was saying there is no *representative* forms.
So, no pictures of humans on other canvases. No pictures of planets other places.
Humans even make pictures of the things they make: like pictures of buildings, or pictures of pots, etc.
All we see around us in the universe *except* in the human sphere, is decorational beauty. We have no representational art in nature.
Now, you almost did it with saying humans are a representation of God. But, given that this is also in the human sphere, it still fails.
Find any *representational* art: where one thing represents another thing.
It is common among intelligent species *humans), but absent in the universe at large.