What's a stained Glass?

The term stained glass can refer to the material of coloured glass or the craft of working with it. Throughout its thousand-year history, the term "stained glass" was applied almost exclusively to the windows of churches, cathedrals, and other significant buildings. Although traditionally made in flat panels and used as windows.

As a material stained glass is glass that has been coloured by adding metallic salts during its manufacture. The coloured glass is crafted into stained glass windows in which small pieces of glass are arranged to form patterns or pictures, held together (traditionally) by strips of lead and supported by a rigid frame. Painted details and yellow stain are often used to enhance the design.