Philippe Caqueray produces large crown glass (1330)
Philippe Caqueray succeeded in producing crown glass with a diameter of 40 to 60 cm! Still, the glass panes that could be produced in the manner remained fairly small, and to cover a window many pieces needed to be adjoined in lead.
In conclusion we can say that, by the end of the Middle Ages, glazed windows were no longer exceptional. However, they were still precious, and luxurious.