Perpendicular Period
A division of English Gothic architecture that is characterised by an emphasis on vertical lines. Its aesthetic can be seen in large windows that are subdivided by long slender mullions (or tracery), providing a great canvas for stained-glass designers. The vertical emphasis was further reinforced with wall panels. The supports either side of the window generally extend into the ceiling to become elaborate fan vaulting. The effect is highly dramatic and encourages the eye to move towards the heavens. Another notable characteristic of perpendicular architecture are the quite extreme hammer beam roofs. During the perpendicular period, advances in joinery and a better understanding of how to distribute the load and thrust of ceiling weight allowed roofs to span great open spaces. (Ambrose, 2008)