Glass block is a great building material; I believe that if Louis Kahn would have had the opportunity he would have made his arches out of glass block and not bricks. Don’t believe me check out his unbuilt design for the Memorial to Six Million Jewish Martyrs. When is the last time that you asked glass block, what do you want? Has anyone ever?  Glass block is one of those materials that have only had part of its potential exploited.  Before I die, I’ll have to build a glass archway as a tribute to the deceased master architect, but until then let’s look at some glass block details.