In Gothic architecture, none of the style elements, such as the pointed arch and the pilgrimage choir plan, are really new. They can be found separately in various Romanesque structures, but never in the same building. Gothic style has three main characteristics that make it its own unique style: highness, vertical lines and flying buttresses.
Romanesque buildings were solid, heavy because of the thick walls, and, as a result of the comparatively small windows, dimly lighted. Gothic cathedrals were built with a slender skeleton, made up with pointed arches and flying buttresses, which gives impressions of harmony and luminosity.
Gothic architecture involved lots of big windows of stained glass, which was impossible for Romanesque buildings, where the thick walls made it not viable to open big spaces on it. Romanesque had splayed windows, and Gothic had mullioned windows, so Gothic is more luminous than