of Salisbury Cathedral where they are in two in the aisles and threes in the clerestory. Because large lancet windows, such as those lighting the aisles of a church, may be wide in comparison to a single light in a traceried window, they often have armatures of wood or iron to support the glass. The arch of a lancet opening is often equilateral, but sometimes is much more acute, and when employed in the arcade of a choir apse, such as at Westminster Abbey, adds to the emphasis of height. The simple shape of the lancet arch may appear in Early Gothic buildings on openings of all types, doorways, niches, arcades, including galleries; and belfry openings. The use of lancet windows is found in the Early Gothic architecture of France, at Saint-Denis, and Sens and Senlis cathedrals. At Chartres and Laon cathedrals lancet windows are grouped beneath the rose windows. Tall narrow lancets are also found in radiating groups in the chancel apses of some churches, such as Chartres Cathedral. It is common in France for lancet windows to be used in smaller, narrower spaces, such as the chapels of a chevet, while traceries windows are used in the clerestory. The style Lancet Gothic is known in England as Early English Gothic, with Salisbury Cathedral being the prime example. York Minster has a group of lancet windows each fifty feet high and still containing ancient glass. They are known as the Five Sisters. Wells Cathedral is notable for the continuous rows of lancet openings that make up the triforiun galleries. Lancet windows are used extensively in the Gothic churches of Italy, including Florence Cathedral and in the Brick Gothic churches of Germany and Poland. Geometric Gothic (England) The Equilateral Arch lends itself to filling with tracery of simple equilateral, circular and semi-circular forms. In France, windows of clerestories and other larger windows were commonly divided into two lights, with some simple Geometric tracery above, a circle or a cinquefoil or sexfoil. This style of window remained popular without great change until after 1300. In England there was a much greater variation in the design of tracery that evolved to fill these spaces. The style is known as Geometric Decorated Gothic and can be seen to splendid effect at many English cathedrals and major churches, where both the eastern and the western terminations of the building may be occupied by a