Works of art make a substantial contribution to cultural identification. When they are placed in a public place, this function is enhanced. However the artwork also acknowledges other tasks: it figuratively announces content in the traditional role, standing as the image of a ruler or at least serves as decoration, while in the Modern period they become increasingly space defining or shaping. Это и многое другое вы найдете в книге 500x Art in Public (Chris van Uffelen)