"Stained glass" can mean colored, painted or enameled glass, or glass tinted with true glass "stains." In this Brief the term refers to both colored and painted glass. "Leaded glass" refers generically to all glass assemblies held in place by lead, copper, or zinc cames. Because the construction, protection, and repair techniques of leaded glass units are similar, whether the glass itself is colored or clear, "stained glass" and "leaded glass" are used interchangeably throughout the text. Glass is a highly versatile medium. In its molten state, it can be spun, blown, rolled, cast in any shape, and given any color. Once cooled, it can be polished, beveled, chipped, etched, engraved, or painted. Of all the decorative effects possible with glass, however, none is more impressive than "stained glass." Since the days of ancient Rome, stained glass in windows and other building elements has shaped and colored light in infinite ways. Stained and leaded glass can be found throughout America in a dazzling variety of colors, patterns, and textures. It appears in windows, doors, ceilings, fanlights, sidelights, light fixtures, and other glazed features found in historic buildings. It appears in all building types and architectural styles-embellishing the light in a great cathedral, or adding a touch of decoration to the smallest row house or bungalow. A number of notable churches, large mansions, civic buildings, and other prominent buildings boast windows or ceilings made of stained glass, but stained or leaded glass also appears as a prominent feature in great numbers of houses built between the Civil War and the Great Depression.