Where to go next in research and practice on information disclosure and institutional transparency? Where to learn and draw inspiration from? How about if we go back to the roots and embrace an original, material notion of transparency as the quality of a substance or element to be see-through? How about, if we then explore how the deliberate use and assemblage of such physical transparency strategies in architecture and design connects to - or could productively connect to - the institutional, political notions of transparency that we are concerned with in our area of institutional or political transparency? Or put more simply and zooming in on one core aspect of the conversation: what have the arrival of glass and its siblings done for democracy and what can we still hope they will do for open, transparent governance now and in the future?