Niko Courtelis’s combines two or three small squares of paper achieving big effects. His heads remind us of the many postage stamps that depend on the authority of renowned individuals, presidents or kings and queens. If we cannot recognize the person in the upper right hand corner of the envelope we may wonder at how unstable the world of nations is, how ISIS, Scotland, Catalonia or Russia can suddenly form a country that will, we imagine, publish its own stamps.