The term stained glass can refer to coloured glass as a material or to works produced from it. Throughout its thousand-year history, the term has been applied almost exclusively to the windows of churches and other significant buildings. Although traditionally made in flat panels and used as windows, the creations of modern stained glass artists also include three-dimensional structures and sculpture.
Modern vernacular usage has often extended the term "stained glass" to include domestic leadlight and objets d'art created from came glasswork exemplified in the famous lamps of Louis Comfort Tiffany.
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. The term stained glass is also applied to windows in which the colours have been painted onto the glass and then fused to the glass in a kiln.
Stained glass, as an art and a craft, requires the artistic skill to conceive an appropriate and workable design, and the engineering skills to assemble the piece. A window must fit snugly into the space for which it is made, must resist wind and rain, and also, especially in the larger windows, must support its own weight. Many large windows have withstood the test of time and remained substantially intact since the late Middle Ages. In Western Europe they constitute the major form of pictorial art to have survived. In this context, the purpose of a stained glass window is not to allow those within a building to see the world outside or even primarily to admit light but rather to control it. For this reason stained glass windows have been described as 'illuminated wall decorations'.
Chapultepec Castle (Castillo de Chapultepec in Spanish) is located on top of Chapultepec Hill. The name Chapultepec stems from the Náhuatl word chapoltepēc which means "at the grasshopper's hill". It is located in the middle of Chapultepec Park in Mexico City at a height of 2,325 meters (7,628 ft) above sea level. The site of the hill was a sacred place for Aztecs, and the buildings atop it have served several purposes during its history, including that of Military Academy, Imperial residence, Presidential home, observatory, and presently, the Museo Nacional de Historia.
It is one of only two Royal Castles in the Americas, as well as the only one in North America that was used to house sovereigns: the Mexican Emperor Maximilian I, and his consort Empress Carlota, during the Second Mexican Empire.