Stumbled upon this in the wonderful Portuguese book Silencio a Silencio about the installation art of Moirika Reker Gilberto Reis (published by the Lisbon art/book publisher Assirio & Alvim). I really love the photo reproductions of stills of the work in the book, but also the (rather elaborate) text accompanying the images. This part about angels intrigued me especially (the book, luckily for me, is both in Portuguese and English).
Angels in Rainer Maria Rilke (first and fourth elegy of 'Duineser Elegien'):
