Here on the Tucson Murals Project, we run an occasional series called "maybe a mural." (What about a couple of tile "blankets" or "serapes" that have teen "tossed" across a stucco wall? Are those murals??) We generally leave those questions to you. (Art, like beauty, is in the eye of the beholder...) What about a "mural" that's destined to be cleaned (or fade) away — like a mandala made of sand?
Anyway, we're back to the archives... back to a time when it was cool enough outside that people wanted to stand on the pavement and spend a lot of time enjoying (what you might call) murals drawn on the sidewalk. These are during an exhibition opening, October 29, 2010, on the big patio at the Tucson Museum of Art. The were made by students at the Museum School, in a Day of the Dead theme, and they were gone after that night.
Murals? That's for you to decide. Art? No question.
To find other murals on this blog that have vanished, scroll through the table of murals (or use your browser's "find in page" command) to look for the word GONE. Then click the link in that line for a photo of the (now-)missing mural.