The upper floor's main document display room, Ireland's Historic Science Centre, Birr Castle Demesne.  The illuminated legend above the cases is from Irish poet William Butler Yeats's He Wishes for the Cloths of Heaven: 

Had I the heavens' embroidered cloths,
Enwrought with golden and silver light,
The blue and the dim and the dark cloths
Of night and light and the half-light,
I would spread the cloths under your feet:
But I, being poor, have only my dreams;
I have spread my dreams under your feet;
Tread softly because you tread on my dreams.

Photo © Sherwood Harrington, 2010