Akagami no Shirayukihime - Vol. 10 Ch. 40

[MangaDex]

 

[Claith]

That vaulted glass ceiling is crazy. No way that between the iron was individual pieces of glass. I'd believe that it was curved sheets of glass that has the iron work layered on top of it. Still hard, but just difficult, not months long to fit the glass to the iron shapes.