In GEOMETRIC DECORATED, large windows having any number of lights up to nine (e.g.: the east window of Carlisle Cathedral) were adorned with tracery forming parts of curves , or even complete curcles, often cusped.
The CURVILINEAR DECORATED, is characterised by the ogee or reversed curves producing reticulated and flowing tracery (e.g.: the west window at York Minster, the octagon at Ely Cathedral and the rose window at Lincoln).
Carved ornament is elaborate. Vaulting is developed by using the tierceron (additional rib). The lierne (decorative cross-rib) makes its appearance towards the end of the period.
The lofty towers and spires of the period are are pierced with openings of Decorated tracery, with crockets and finials on the outer arch moulding (e.g.: the tower at Lincoln Cathedral, the spires at Lichfield).
