Coloured glass turns a plain roof into a lamp by day and a landmark by night.
From below, the roof looks like a stained glass window laid flat over the building. From the street at night, it glows.
Inside, the colours fall on the floor and move through the day. Visitors walk slower under it, which is exactly what a museum wants.
Every floor plan lies a little. Stairs cannot: they show how a building really moves people from one level to the next.
One building, hundreds of balconies, each one painted to tell you where you live.
Some buildings only work under one kind of sky.
