I remember that my friend Terrance’s dad used to make beautiful stained glass patterns as a hobby, and although I doubt he still does to this day, the art of producing a stained glass piece remains something rather special.
The following video (from How Its Made) gives a great overview of the process of putting together a stained glass panel, showing how the pieces of glass are cut, combined with lead, and then soldered and finally puttied to leave us with the final product:
Clever. (Particularly that last part on how one adds shading to stained glass pieces!)