La Seo owns and preserves a collection of 63 Flemish tapestries and 6 other tapestries called reposteros that kings, archbishops and the council donated to La Seo for their cultural exhibition on the cathedral. We can find medieval and gothic Flemish tapestries from 15th, 16th and 17th centuries weaved on the looms of Arras, Toumai and Brussels.
In 1991 a symposium took place in Saragossa in which was stated that this collection of La Seo is the most important of the world.