How many murals do you think there are in Minneapolis?
Hold on, don't answer yet.
First we have to talk about what we mean by murals.
There are three kinds of murals, also called wall art:
1. Community
These range from charmingly amateurish to professionally abstract, like the downtown Dylan mural. Often sponsored by the community or an organization, they turn an empty space into something bright and colorful, and give a place a sense of identity. They bring color and life to a vacant area when they're new; they hint at sadness and abandonment when they're faded and peeled.
2. Unsanctioned (aka, graffiti)
These pop up when people decide that a blank wall shouldn't be blank (regardless of what the owner might think), and festoon it with letters and pictures. The result can be quite accomplished; it can also be loud and tiresome.