The Crown of Glass, often referred to simply as the Crown, is a kingdom of technologically advanced artists led by the Doyenne. It has five city-schools: the Sculpture, the Theater, the Garden, the Desk and the Factory.
The Crown follows "the Church of the Self," a humanist and functionalist belief system. They believe embellishment should reflect either utility or something innate inside the work. They also deeply believe that everything necessary to comprehend a work of art should be contained within the work itself. It should never need context (whether by reminding the viewer of something or by making a statement on something external to the work) to be beautiful. If it's referencing a previous work, then one should be able to find that work within the new work, somewhere deep inside.
Many hundreds of years ago, pilgrims from Memorious fled the Divine Fleet and landed on Quire, intending to start an artists' colony. They were unprepared for the attempt. Hundreds of years of internal and external war followed.
One hundred years ago, a genius discovered how to use silica-vitrus, and the Crown of Glass was established over the groups of scattered artists who remained.
In more recent times, a king, third or fourth of his line, took the throne, but abused his power. Saint Symmetry and the Doyenne, a woman of unparalleled talent with Glass, worked together to kill him. Since then, the Doyenne has ruled the Crown of Glass.