Too often in a modern building the work of art is an afterthought – a piece of decoration added to fill a space that is felt to be too empty. Ideally the work of art should be a focus round which the harmony of the whole building revolves – inseparable from the design, structurally coherent and aesthetically essential... He [the sculptor] will want to consider both external proportions and internal space volumes in relation to the size and style of sculpture that might be required – not merely the decorative function of sculpture... I am thinking of the didactic and symbolic functions of sculpture in Gothic architecture, inseparable from the architectural conception itself...