Lightning container component
Holes cut in the stone of the wall and filled with stained glass are called plate tracery, elaborated based on stone blocks or "plates" that are part of the muraría structure, in order to create a perforated pattern. It arises at the end of the XII century and the beginning of the XIII, before the need to add a decorative motif that would not leave bare the ashlar area that was free when two or more lancets were placed next to each other under an arched drip molding.
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