'Despite the enthusiasm for a few acknowledged masterpieces, much public art is pretty terrible, however. One reason for this is that it is often meant to be permanent. This means artists are limited in their choice of materials and scale, which can stifle their ambition. Public art works have to comply with standards imposed by engineers and safety inspectors, and must not offend public decency. Then there’s often a lack of oversight and maintenance that can leave outdoor sculptures looking tragically neglected.'