Long DescriptionEnglish version of late Gothic, developed from the 1320s, which continued into the early 16th century; sometimes abbreviated to Perp. Characterised by large windows with a grid pattern of mullions and transoms, with the mullions continuing to the head to the arch, which is often of flattened or four-centred form. This motif of panel tracery is used also for wall decoration, and on the fan vaults that were used for the most prestigious buildings.