Glass is one of the materials that has played a role in the construction of what Heidegger—when discussing architecture—termed "boundaries." It has done so in an ambiguous, complex, and elusive manner, mediating between light and the gaze. The optical properties of this material trigger a series of perceptual, emotional, and semiological dimensions that transcend a purely scientific study.
This text reflects on twenty-two words, accompanied by a series of images, that refer to these aspects and help us understand how architecture utilizes some of the most elusive qualities of this paradoxical material—properties that are sometimes employed deliberately and, at other times, activated unexpectedly, adding masks and layers of mystery to the material.
