The term COMMON STAINED GLASS ELEMENT can be summarized as LEAD, which is a four-letter word. LEAD is a metal that has been used in stained glass windows since the Middle Ages. It is malleable and easy to work with, making it an ideal material for creating intricate designs. LEAD also provides structural support for the glass, allowing it to hold its shape. LEAD is still used today in stained glass windows, and is one of the most common elements used in the craft.