Bronze

This incredible building is on Salford Quays; the glass has a bronze patina which glows in the sun, but as clouds pass or the light changes, the colour of the building changes too. It could be the wonderful palace of a benevolent king, or university offering the greatest opportunities to its students, or it could be the headquarters of a megalomaniac proprietor of an ethically dubious corporation, or the temple of a weird and rather threatening and sinister religious cult. When we saw it, it was glowing magnificently, and benignly!