The most impressive feature of the nation of Grimteine was the city of Donadune, which was constructed almost entirely of glass. Using the very sands that make-up most of the landscape, it was constructed and tempered with magic to make it strong as steel, and altered so that the suns rays would make the walls radiant and not blinding. It was altered more as to not be able to see through the glass (except where wanted), while still maintaing its look. It is a wonder to behold, and is home to the ruling council of the nation.
-Mentioned in the background of Caerwyn ap Seirol