I would like us to take a moment to celebrate windows. These versatile building products possess all the attributes of greatness and genius. They are simple – glass and a frame. But they can also be intricate – tiny coloured pieces of glass and artistically shaped lead. They can be small. They can be massive. They can be found in a palace and in a hut. They let things in and keep things out. Their view can cheer a soul or strike terror in a soldier. They can be functional or they can also be stunningly beautiful. Windows done well are perfectly humble. And for all these reasons I think we not only need to take a moment to celebrate windows, but to also learn from them.