So, sort of not related to anything in the episode, but in relation to the world itself-- I am obsessed with world building.
At the end of the show, @AdamKoebel was talking about how the number 4 became important/sacred in the world of Court of Swords. That got me thinking and is really fascinating to me from the perspective of geometry. There is a total of 3 "regular" tilings. As in, you can take the shape and make a space filling pattern with only that shape and no gaps. Regular (all edges are the same length, all angles are the same) triangles, hexagons, and squares all produce these types of patterns. Simply put, squares (and other four sided polygons) form infinitely repeating patterns.
Here's where things get fun: 5. Five fold symmetry (pentagons and 5 pointed stars) can produce irregular patterns. Developed by Penrose in the 70's, his tilings revolve around pentagons; they can fill space without gaps, but do not repeat yet they follow strict rules. Recent work (from as recent as 2012) has been done relating the geometry of islamic artwork and penrose tilings. Geometric islamic art has patterns that revolve around irregular (non repeating) patterns.
Now, here's where I'm curious from an artistic standpoint in the Court of Swords world. If the City of Brass takes it's artistic and architectural inspiration from islamic cultures, then I highly doubt it would have those irregular patterns because they often utilize pentagons, 5 pointed stars, and other "blasphemous" geometry (5, 6, 7, 8, 9, 10, 11, 12 etc pointed stars or sided polygons). So I'd be curious if the predominant artwork and architecture of the area revolved around these real world analogs (perhaps predating the development of the sacred 4 and the other stuff talked about at the end of the episode etc.) or would it be closer to stuff like truncated square tilings that have a more mediterranean feel to them (early Islamic art often has 4 and 8 pointed/sided polygon based patterns as well). I can elaborate more with pictures-- I've been working on a fantasy city layout based on Penrose tilings inspired by the City of Brass.