The final Mezquita had 19 doors along its north side, filling it with light and yielding a sense of openness. Nowadays, nearly all these doorways are closed off, dampening the vibrant effect of the red-and-white double arches. Christian additions to the building, such as the solid mass of the cathedral in the centre and the 50 or so chapels around the fringes, further enclose and impose on the airy space.