Although all art is inherently public—created in order to convey an idea or emotion to others—“public art,” as opposed to art that is sequestered in museums and galleries, is art specifically designed for a public arena where the art will be encountered by people in their normal day-to-day activities. Public art can be purely ornamental or highly functional; it can be as subtle as a decorative door knob or as conspicuous as the Chicago Picasso. It is also an essential element of effective urban design. The more obvious forms of public art include monuments, sculptures, fountains, murals, and gardens. But public art also takes the form of ornamental benches or street lights, decorative manhole covers, and mosaics on trash bins. Many city dwellers would be surprised to discover just how much public art is really around them and how much art they have passed by without noticing, and how much impact public art has on their day-to-day lives.