conceptual art
The most fundamentally revisionary feature of conceptual art is the way in which it proclaims itself to be an art of the mind rather than the senses: it rejects traditional artistic media because it locates the artwork at the level of ideas rather than that of objects. As process matters more than physical material, and because art should be about intellectual inquiry and reflection rather than beauty and aesthetic pleasure, the work of art is said to be the idea at the heart of the piece in question. In the words of Kosuth, ‘[t]he actual works of art are ideas’ (Lippard 1973, 25). For conceptual art, ‘the idea or concept is the most important aspect of the work’ (LeWitt 1967, 166). Art is ‘de-materialised’; art is prior to its materialisation and is ultimately rooted in the agency of the artist. If art is de-materialised in this fashion, it is less likely, or so the early conceptual artists held, to be institutionalised.
The claim that the conceptual artwork itself is to be identified with the idea that may be seen to underlie it has far-reaching ramifications. It not only affects the ontology of the conceptual artwork but also profoundly alters the role of the artist by casting her in the role of thinker rather than object-maker. Moreover, it calls for a thorough review of the way in which we perceive, engage and appreciate artworks. Further still, it links art so intimately to ideas and concepts that even a principled distinction between the domain of art and the realm of thought seems difficult to preserve.
-stanford encyclopedia of philosophy
street photography
documentary photography that features subjects in candid situations within public places such as streets, parks, beaches, malls, political conventions, and other settings
street art
art developed in public spaces — that is, "in the streets" — though the term usually refers to art of an illicit nature, as opposed to government sponsored initiatives
can include traditional graffiti artwork, stencil graffiti, sticker art, wheatpasting and street poster art, video projection, art intervention, guerrilla art, flash mobbing and street installations
contemporary public-space artwork rather than territorial graffiti, vandalism, and corporate art