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So long as the tracery preserves the simple character of piercings through a flat stone, filling the space between the window heads, it is known as plate tracery.

The two windows at the north end of the great chamber are evidently later additions, as they have fully developed bar-tracery, while the other windows in the chamber consist of pairs of trefoil-headed windows with a quatrefoil in plate tracery above them.

Where the tracery is formed by ornamental apertures pierced through a plate of stone, it is called plate tracery, and is certain to be of not later date than the earlier part of the 13th century.

These contain beautiful examples of plate tracery windows.

The windows are of plate tracery, and mark the transition between Early English and Decorated.