Looking at the ribbed vault of a Gothic Cathedral. Mirando la bóveda de nervaduras de una catedral gótica

It´s an artistic representation, of course this is not structurally exactly like a ribbed vault. 

¨The intersection of two or three barrel vaults produces a rib vault or ribbed vault when they are edged with an armature of piped masonry often carved in decorative patterns; compare groin vault, an older form of vault construction. While the mechanics of the weight of a groin vault and its transmission outwards to the supporting pillars remained as it had been, the new use of rib vaults demonstrates the skill of the masons and the grandeur of the new ideas circulating at the introduction of Gothic architecture in the end of the eleventh century.¨

http://en.wikipedia.org/wiki/Rib_vault

Looking at the ribbed vault of a Gothic Cathedral by Myriam B. Mahiques is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.